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X+7=2(X+4)
We move all terms to the left:
X+7-(2(X+4))=0
We calculate terms in parentheses: -(2(X+4)), so:We get rid of parentheses
2(X+4)
We multiply parentheses
2X+8
Back to the equation:
-(2X+8)
X-2X-8+7=0
We add all the numbers together, and all the variables
-1X-1=0
We move all terms containing X to the left, all other terms to the right
-X=1
X=1/-1
X=-1
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