x-(x*0.1)=90

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Solution for x-(x*0.1)=90 equation: 


Simplifying
x + -1(x * 0.1) = 90

Reorder the terms for easier multiplication:
x + -1(0.1x) = 90

Remove parenthesis around (0.1x)
x + -1 * 0.1x = 90

Multiply -1 * 0.1
x + -0.1x = 90

Combine like terms: x + -0.1x = 0.9x
0.9x = 90

Solving
0.9x = 90

Solving for variable 'x'.

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

Divide each side by '0.9'.
x = 100

Simplifying
x = 100

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