123-x=12

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Solution for 123-x=12 equation: 


Simplifying
123 + -1x = 12

Solving
123 + -1x = 12

Solving for variable 'x'.

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

Add '-123' to each side of the equation.
123 + -123 + -1x = 12 + -123

Combine like terms: 123 + -123 = 0
0 + -1x = 12 + -123
-1x = 12 + -123

Combine like terms: 12 + -123 = -111
-1x = -111

Divide each side by '-1'.
x = 111

Simplifying
x = 111

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