91=8x-x

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Solution for 91=8x-x equation:


Simplifying
91 = 8x + -1x

Combine like terms: 8x + -1x = 7x
91 = 7x

Solving
91 = 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
91 + -7x = 7x + -7x

Combine like terms: 7x + -7x = 0
91 + -7x = 0

Add '-91' to each side of the equation.
91 + -91 + -7x = 0 + -91

Combine like terms: 91 + -91 = 0
0 + -7x = 0 + -91
-7x = 0 + -91

Combine like terms: 0 + -91 = -91
-7x = -91

Divide each side by '-7'.
x = 13

Simplifying
x = 13

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