120=x-9

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Solution for 120=x-9 equation:


Simplifying
120 = x + -9

Reorder the terms:
120 = -9 + x

Solving
120 = -9 + 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.
120 + -1x = -9 + x + -1x

Combine like terms: x + -1x = 0
120 + -1x = -9 + 0
120 + -1x = -9

Add '-120' to each side of the equation.
120 + -120 + -1x = -9 + -120

Combine like terms: 120 + -120 = 0
0 + -1x = -9 + -120
-1x = -9 + -120

Combine like terms: -9 + -120 = -129
-1x = -129

Divide each side by '-1'.
x = 129

Simplifying
x = 129

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