X-18=31

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Solution for X-18=31 equation: 


Simplifying
X + -18 = 31

Reorder the terms:
-18 + X = 31

Solving
-18 + X = 31

Solving for variable 'X'.

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

Add '18' to each side of the equation.
-18 + 18 + X = 31 + 18

Combine like terms: -18 + 18 = 0
0 + X = 31 + 18
X = 31 + 18

Combine like terms: 31 + 18 = 49
X = 49

Simplifying
X = 49

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