x-0.4x=90

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Solution for x-0.4x=90 equation: 


Simplifying
x + -0.4x = 90

Combine like terms: x + -0.4x = 0.6x
0.6x = 90

Solving
0.6x = 90

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 = 150

Simplifying
x = 150

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