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X+(X+2)=178
We move all terms to the left:
X+(X+2)-(178)=0
We get rid of parentheses
X+X+2-178=0
We add all the numbers together, and all the variables
2X-176=0
We move all terms containing X to the left, all other terms to the right
2X=176
X=176/2
X=88
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