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7(x)+12=2x-13
We move all terms to the left:
7(x)+12-(2x-13)=0
We get rid of parentheses
7x-2x+13+12=0
We add all the numbers together, and all the variables
5x+25=0
We move all terms containing x to the left, all other terms to the right
5x=-25
x=-25/5
x=-5
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