18+x=39

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Solution for 18+x=39 equation: 


Simplifying
18 + x = 39

Solving
18 + x = 39

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 = 39 + -18

Combine like terms: 18 + -18 = 0
0 + x = 39 + -18
x = 39 + -18

Combine like terms: 39 + -18 = 21
x = 21

Simplifying
x = 21

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