X-123=15

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Solution for X-123=15 equation: 


Simplifying
X + -123 = 15

Reorder the terms:
-123 + X = 15

Solving
-123 + X = 15

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 + X = 15 + 123

Combine like terms: -123 + 123 = 0
0 + X = 15 + 123
X = 15 + 123

Combine like terms: 15 + 123 = 138
X = 138

Simplifying
X = 138

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