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13+x=2(6x+7)
We move all terms to the left:
13+x-(2(6x+7))=0
We calculate terms in parentheses: -(2(6x+7)), so:We get rid of parentheses
2(6x+7)
We multiply parentheses
12x+14
Back to the equation:
-(12x+14)
x-12x-14+13=0
We add all the numbers together, and all the variables
-11x-1=0
We move all terms containing x to the left, all other terms to the right
-11x=1
x=1/-11
x=-1/11
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