100=(x*0.4)+(x*0.4)*0.4+(x*0.4)*0.4*0.4+(x*0.4)*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4

Simple and best practice solution for 100=(x*0.4)+(x*0.4)*0.4+(x*0.4)*0.4*0.4+(x*0.4)*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4*0

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Solution for 100=(x*0.4)+(x*0.4)*0.4+(x*0.4)*0.4*0.4+(x*0.4)*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4*0.4*0.4 equation: 


Simplifying
100 = (x * 0.4) + (x * 0.4) * 0.4 + (x * 0.4) * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + (x * 0.4) * 0.4 + (x * 0.4) * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + (0.4x) * 0.4 + (x * 0.4) * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Remove parenthesis around (0.4x)
100 = (0.4x) + 0.4x * 0.4 + (x * 0.4) * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.4 * 0.4
100 = (0.4x) + 0.16x + (x * 0.4) * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + (0.4x) * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Remove parenthesis around (0.4x)
100 = (0.4x) + 0.16x + 0.4x * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.4 * 0.4
100 = (0.4x) + 0.16x + 0.16 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.16 * 0.4
100 = (0.4x) + 0.16x + 0.064x + (x * 0.4) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + (0.4x) * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Remove parenthesis around (0.4x)
100 = (0.4x) + 0.16x + 0.064x + 0.4x * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.4 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.16 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.16 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.064 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.064 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + (0.4x) * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Remove parenthesis around (0.4x)
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.4x * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.4 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.4 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.16 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.16 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.064 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.064 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.0256 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.0256 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + (0.4x) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Remove parenthesis around (0.4x)
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.4x * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.4 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.16 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.16 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.064 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.064 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.0256 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.0256 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.01024 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.01024 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + (0.4x) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Remove parenthesis around (0.4x)
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.4x * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.4 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.16 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.16 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.064 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.064 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0256 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.0256 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.01024 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.01024 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.004096 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.004096 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + (0.4x) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Remove parenthesis around (0.4x)
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.4x * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.4 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.16 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.16 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.064 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.064 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.0256 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.0256 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.01024 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.01024 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.004096 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.004096 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.0016384 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.0016384 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + (0.4x) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Remove parenthesis around (0.4x)
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.4x * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.4 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.16 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.16 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.064 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.064 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.0256 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.0256 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.01024 * 0.4 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.01024 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.004096 * 0.4 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.004096 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.0016384 * 0.4 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.0016384 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.00065536 * 0.4x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Multiply 0.00065536 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + (x * 0.4) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + (0.4x) * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Remove parenthesis around (0.4x)
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.4x * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4

Reorder the terms for easier multiplication:
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x

Multiply 0.4 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.16 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x

Multiply 0.16 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.064 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x

Multiply 0.064 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.0256 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x

Multiply 0.0256 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.01024 * 0.4 * 0.4 * 0.4 * 0.4 * 0.4x

Multiply 0.01024 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.004096 * 0.4 * 0.4 * 0.4 * 0.4x

Multiply 0.004096 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.0016384 * 0.4 * 0.4 * 0.4x

Multiply 0.0016384 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.00065536 * 0.4 * 0.4x

Multiply 0.00065536 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.000262144 * 0.4x

Multiply 0.000262144 * 0.4
100 = (0.4x) + 0.16x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.0001048576x

Combine like terms: (0.4x) + 0.16x = 0.56x
100 = 0.56x + 0.064x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.0001048576x

Combine like terms: 0.56x + 0.064x = 0.624x
100 = 0.624x + 0.0256x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.0001048576x

Combine like terms: 0.624x + 0.0256x = 0.6496x
100 = 0.6496x + 0.01024x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.0001048576x

Combine like terms: 0.6496x + 0.01024x = 0.65984x
100 = 0.65984x + 0.004096x + 0.0016384x + 0.00065536x + 0.000262144x + 0.0001048576x

Combine like terms: 0.65984x + 0.004096x = 0.663936x
100 = 0.663936x + 0.0016384x + 0.00065536x + 0.000262144x + 0.0001048576x

Combine like terms: 0.663936x + 0.0016384x = 0.6655744x
100 = 0.6655744x + 0.00065536x + 0.000262144x + 0.0001048576x

Combine like terms: 0.6655744x + 0.00065536x = 0.66622976x
100 = 0.66622976x + 0.000262144x + 0.0001048576x

Combine like terms: 0.66622976x + 0.000262144x = 0.666491904x
100 = 0.666491904x + 0.0001048576x

Combine like terms: 0.666491904x + 0.0001048576x = 0.6665967616x
100 = 0.6665967616x

Solving
100 = 0.6665967616x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-0.6665967616x' to each side of the equation.
100 + -0.6665967616x = 0.6665967616x + -0.6665967616x

Combine like terms: 0.6665967616x + -0.6665967616x = 0.0000000000
100 + -0.6665967616x = 0.0000000000

Add '-100' to each side of the equation.
100 + -100 + -0.6665967616x = 0.0000000000 + -100

Combine like terms: 100 + -100 = 0
0 + -0.6665967616x = 0.0000000000 + -100
-0.6665967616x = 0.0000000000 + -100

Combine like terms: 0.0000000000 + -100 = -100
-0.6665967616x = -100

Divide each side by '-0.6665967616'.
x = 150.0157303

Simplifying
x = 150.0157303

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| 100=(x*0.4)+(x*0.4)*0.4+(x*0.4)*0.4*0.4+(x*0.4)*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4 | | 100=(x*0.4)+(x*0.4)*0.4+(x*0.4)*0.4*0.4+(x*0.4)*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4 | | 100=(x*0.4)+(x*0.4)*0.4+(x*0.4)*0.4*0.4+(x*0.4)*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4*0.4 | | 13-6x=5-7x | | 15x^2-19x=10 | | b+52=64 | | 6x+6=-54-4x | | 3(g+5)=36 | | (7-4i)(5+8i)= | | 12x+1=2x+3 | | 5g+g=12 | | 5+-2x=3x+1 | | 2(x+11)=0 | | 34=6-5x | | 19=9x+4-6x | | 5y+3(y-8)=5(y+1)-3 | | 2(x^2+6)+(2x-9)*2x= | | 3x-5-4x-3= | | 17=8x+5-4x | | 5+-1x=3x+1 | | 15-2*(-3x)=37 | | 5-sx=3x+1 | | 3(4x-3)=2 | | 5x+3x-7=49 | | 1/2x+3=2/3(x-4)+1/6 | | 5y=6x-2 | | 9(4y-7)= | | -15+8-(-7)-4= | | 7x^2+5x=x^2-13 | | 100=(x*0.4)+(x*0.4)*0.4+(x*0.4)*0.4*0.4+(x*0.4)*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4+(x*0.4)*0.4*0.4*0.4*0.4*0.4*0.4 | | 7(9x-15)=27 | | 5-10-3x^2=0 |

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