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X+5(X+2)=140
We move all terms to the left:
X+5(X+2)-(140)=0
We multiply parentheses
X+5X+10-140=0
We add all the numbers together, and all the variables
6X-130=0
We move all terms containing X to the left, all other terms to the right
6X=130
X=130/6
X=21+2/3
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