90=x+7x

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Solution for 90=x+7x equation:


Simplifying
90 = x + 7x

Combine like terms: x + 7x = 8x
90 = 8x

Solving
90 = 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
90 + -8x = 8x + -8x

Combine like terms: 8x + -8x = 0
90 + -8x = 0

Add '-90' to each side of the equation.
90 + -90 + -8x = 0 + -90

Combine like terms: 90 + -90 = 0
0 + -8x = 0 + -90
-8x = 0 + -90

Combine like terms: 0 + -90 = -90
-8x = -90

Divide each side by '-8'.
x = 11.25

Simplifying
x = 11.25

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