-7x-9=x-81

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


Simplifying
-7x + -9 = x + -81

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

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

Solving
-9 + -7x = -81 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-9 + -7x + -1x = -81 + x + -1x

Combine like terms: -7x + -1x = -8x
-9 + -8x = -81 + x + -1x

Combine like terms: x + -1x = 0
-9 + -8x = -81 + 0
-9 + -8x = -81

Add '9' to each side of the equation.
-9 + 9 + -8x = -81 + 9

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

Combine like terms: -81 + 9 = -72
-8x = -72

Divide each side by '-8'.
x = 9

Simplifying
x = 9

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