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11x-5(x-7)=12x-13
We move all terms to the left:
11x-5(x-7)-(12x-13)=0
We multiply parentheses
11x-5x-(12x-13)+35=0
We get rid of parentheses
11x-5x-12x+13+35=0
We add all the numbers together, and all the variables
-6x+48=0
We move all terms containing x to the left, all other terms to the right
-6x=-48
x=-48/-6
x=+8
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