x-(x(.4))=80

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Solution for x-(x(.4))=80 equation: 


Simplifying
x + -1(x(0.4)) = 80

Reorder the terms for easier multiplication:
x + -1(0.4x) = 80

Remove parenthesis around (0.4x)
x + -1 * 0.4x = 80

Multiply -1 * 0.4
x + -0.4x = 80

Combine like terms: x + -0.4x = 0.6x
0.6x = 80

Solving
0.6x = 80

Solving for variable 'x'.

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

Divide each side by '0.6'.
x = 133.3333333

Simplifying
x = 133.3333333

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