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X-(3X+2)=102
We move all terms to the left:
X-(3X+2)-(102)=0
We get rid of parentheses
X-3X-2-102=0
We add all the numbers together, and all the variables
-2X-104=0
We move all terms containing X to the left, all other terms to the right
-2X=104
X=104/-2
X=-52
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