-x-99=9x+31

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Solution for -x-99=9x+31 equation:


Simplifying
-1x + -99 = 9x + 31

Reorder the terms:
-99 + -1x = 9x + 31

Reorder the terms:
-99 + -1x = 31 + 9x

Solving
-99 + -1x = 31 + 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.
-99 + -1x + -9x = 31 + 9x + -9x

Combine like terms: -1x + -9x = -10x
-99 + -10x = 31 + 9x + -9x

Combine like terms: 9x + -9x = 0
-99 + -10x = 31 + 0
-99 + -10x = 31

Add '99' to each side of the equation.
-99 + 99 + -10x = 31 + 99

Combine like terms: -99 + 99 = 0
0 + -10x = 31 + 99
-10x = 31 + 99

Combine like terms: 31 + 99 = 130
-10x = 130

Divide each side by '-10'.
x = -13

Simplifying
x = -13

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