-4x=x-90

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Solution for -4x=x-90 equation: 


Simplifying
-4x = x + -90

Reorder the terms:
-4x = -90 + x

Solving
-4x = -90 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-4x + -1x = -90 + x + -1x

Combine like terms: -4x + -1x = -5x
-5x = -90 + x + -1x

Combine like terms: x + -1x = 0
-5x = -90 + 0
-5x = -90

Divide each side by '-5'.
x = 18

Simplifying
x = 18

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