X+42=57

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Solution for X+42=57 equation: 


Simplifying
X + 42 = 57

Reorder the terms:
42 + X = 57

Solving
42 + X = 57

Solving for variable 'X'.

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

Add '-42' to each side of the equation.
42 + -42 + X = 57 + -42

Combine like terms: 42 + -42 = 0
0 + X = 57 + -42
X = 57 + -42

Combine like terms: 57 + -42 = 15
X = 15

Simplifying
X = 15

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