120.5-x=13

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Solution for 120.5-x=13 equation: 


Simplifying
120.5 + -1x = 13

Solving
120.5 + -1x = 13

Solving for variable 'x'.

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

Add '-120.5' to each side of the equation.
120.5 + -120.5 + -1x = 13 + -120.5

Combine like terms: 120.5 + -120.5 = 0.0
0.0 + -1x = 13 + -120.5
-1x = 13 + -120.5

Combine like terms: 13 + -120.5 = -107.5
-1x = -107.5

Divide each side by '-1'.
x = 107.5

Simplifying
x = 107.5

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