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X+3(X+3)=2
We move all terms to the left:
X+3(X+3)-(2)=0
We multiply parentheses
X+3X+9-2=0
We add all the numbers together, and all the variables
4X+7=0
We move all terms containing X to the left, all other terms to the right
4X=-7
X=-7/4
X=-1+3/4
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