x+x-18+18=84+18

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Solution for x+x-18+18=84+18 equation: 


Simplifying
x + x + -18 + 18 = 84 + 18

Reorder the terms:
-18 + 18 + x + x = 84 + 18

Combine like terms: -18 + 18 = 0
0 + x + x = 84 + 18
x + x = 84 + 18

Combine like terms: x + x = 2x
2x = 84 + 18

Combine like terms: 84 + 18 = 102
2x = 102

Solving
2x = 102

Solving for variable 'x'.

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

Divide each side by '2'.
x = 51

Simplifying
x = 51

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