x-(x*0.8)=9

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Solution for x-(x*0.8)=9 equation: 


Simplifying
x + -1(x * 0.8) = 9

Reorder the terms for easier multiplication:
x + -1(0.8x) = 9

Remove parenthesis around (0.8x)
x + -1 * 0.8x = 9

Multiply -1 * 0.8
x + -0.8x = 9

Combine like terms: x + -0.8x = 0.2x
0.2x = 9

Solving
0.2x = 9

Solving for variable 'x'.

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

Divide each side by '0.2'.
x = 45

Simplifying
x = 45

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