x+81=9x-7

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Solution for x+81=9x-7 equation:


Simplifying
x + 81 = 9x + -7

Reorder the terms:
81 + x = 9x + -7

Reorder the terms:
81 + x = -7 + 9x

Solving
81 + x = -7 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
81 + x + -9x = -7 + 9x + -9x

Combine like terms: x + -9x = -8x
81 + -8x = -7 + 9x + -9x

Combine like terms: 9x + -9x = 0
81 + -8x = -7 + 0
81 + -8x = -7

Add '-81' to each side of the equation.
81 + -81 + -8x = -7 + -81

Combine like terms: 81 + -81 = 0
0 + -8x = -7 + -81
-8x = -7 + -81

Combine like terms: -7 + -81 = -88
-8x = -88

Divide each side by '-8'.
x = 11

Simplifying
x = 11

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