x+138=126

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Solution for x+138=126 equation: 


Simplifying
x + 138 = 126

Reorder the terms:
138 + x = 126

Solving
138 + x = 126

Solving for variable 'x'.

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

Add '-138' to each side of the equation.
138 + -138 + x = 126 + -138

Combine like terms: 138 + -138 = 0
0 + x = 126 + -138
x = 126 + -138

Combine like terms: 126 + -138 = -12
x = -12

Simplifying
x = -12

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