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X+2(X-1)=1
We move all terms to the left:
X+2(X-1)-(1)=0
We multiply parentheses
X+2X-2-1=0
We add all the numbers together, and all the variables
3X-3=0
We move all terms containing X to the left, all other terms to the right
3X=3
X=3/3
X=1
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