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13=8-6x-7
We move all terms to the left:
13-(8-6x-7)=0
We add all the numbers together, and all the variables
-(-6x+1)+13=0
We get rid of parentheses
6x-1+13=0
We add all the numbers together, and all the variables
6x+12=0
We move all terms containing x to the left, all other terms to the right
6x=-12
x=-12/6
x=-2
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