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13x-7=2(6x+2)
We move all terms to the left:
13x-7-(2(6x+2))=0
We calculate terms in parentheses: -(2(6x+2)), so:We get rid of parentheses
2(6x+2)
We multiply parentheses
12x+4
Back to the equation:
-(12x+4)
13x-12x-4-7=0
We add all the numbers together, and all the variables
x-11=0
We move all terms containing x to the left, all other terms to the right
x=11
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