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X+2(X-1)=5
We move all terms to the left:
X+2(X-1)-(5)=0
We multiply parentheses
X+2X-2-5=0
We add all the numbers together, and all the variables
3X-7=0
We move all terms containing X to the left, all other terms to the right
3X=7
X=7/3
X=2+1/3
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