-7x+90=-8x+12-12x

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Solution for -7x+90=-8x+12-12x equation: 


Simplifying
-7x + 90 = -8x + 12 + -12x

Reorder the terms:
90 + -7x = -8x + 12 + -12x

Reorder the terms:
90 + -7x = 12 + -8x + -12x

Combine like terms: -8x + -12x = -20x
90 + -7x = 12 + -20x

Solving
90 + -7x = 12 + -20x

Solving for variable 'x'.

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

Add '20x' to each side of the equation.
90 + -7x + 20x = 12 + -20x + 20x

Combine like terms: -7x + 20x = 13x
90 + 13x = 12 + -20x + 20x

Combine like terms: -20x + 20x = 0
90 + 13x = 12 + 0
90 + 13x = 12

Add '-90' to each side of the equation.
90 + -90 + 13x = 12 + -90

Combine like terms: 90 + -90 = 0
0 + 13x = 12 + -90
13x = 12 + -90

Combine like terms: 12 + -90 = -78
13x = -78

Divide each side by '13'.
x = -6

Simplifying
x = -6

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