-x-72=99+8x

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Solution for -x-72=99+8x equation:


Simplifying
-1x + -72 = 99 + 8x

Reorder the terms:
-72 + -1x = 99 + 8x

Solving
-72 + -1x = 99 + 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.
-72 + -1x + -8x = 99 + 8x + -8x

Combine like terms: -1x + -8x = -9x
-72 + -9x = 99 + 8x + -8x

Combine like terms: 8x + -8x = 0
-72 + -9x = 99 + 0
-72 + -9x = 99

Add '72' to each side of the equation.
-72 + 72 + -9x = 99 + 72

Combine like terms: -72 + 72 = 0
0 + -9x = 99 + 72
-9x = 99 + 72

Combine like terms: 99 + 72 = 171
-9x = 171

Divide each side by '-9'.
x = -19

Simplifying
x = -19

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