-9x-9=1x+21

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Solution for -9x-9=1x+21 equation:


Simplifying
-9x + -9 = 1x + 21

Reorder the terms:
-9 + -9x = 1x + 21

Reorder the terms:
-9 + -9x = 21 + 1x

Solving
-9 + -9x = 21 + 1x

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 + -9x + -1x = 21 + 1x + -1x

Combine like terms: -9x + -1x = -10x
-9 + -10x = 21 + 1x + -1x

Combine like terms: 1x + -1x = 0
-9 + -10x = 21 + 0
-9 + -10x = 21

Add '9' to each side of the equation.
-9 + 9 + -10x = 21 + 9

Combine like terms: -9 + 9 = 0
0 + -10x = 21 + 9
-10x = 21 + 9

Combine like terms: 21 + 9 = 30
-10x = 30

Divide each side by '-10'.
x = -3

Simplifying
x = -3

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