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(X)+(X+2)=111
We move all terms to the left:
(X)+(X+2)-(111)=0
We get rid of parentheses
X+X+2-111=0
We add all the numbers together, and all the variables
2X-109=0
We move all terms containing X to the left, all other terms to the right
2X=109
X=109/2
X=54+1/2
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