90-x=2x-30

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Solution for 90-x=2x-30 equation:


Simplifying
90 + -1x = 2x + -30

Reorder the terms:
90 + -1x = -30 + 2x

Solving
90 + -1x = -30 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
90 + -1x + -2x = -30 + 2x + -2x

Combine like terms: -1x + -2x = -3x
90 + -3x = -30 + 2x + -2x

Combine like terms: 2x + -2x = 0
90 + -3x = -30 + 0
90 + -3x = -30

Add '-90' to each side of the equation.
90 + -90 + -3x = -30 + -90

Combine like terms: 90 + -90 = 0
0 + -3x = -30 + -90
-3x = -30 + -90

Combine like terms: -30 + -90 = -120
-3x = -120

Divide each side by '-3'.
x = 40

Simplifying
x = 40

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