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-8-2n=-12n+12
We move all terms to the left:
-8-2n-(-12n+12)=0
We get rid of parentheses
-2n+12n-12-8=0
We add all the numbers together, and all the variables
10n-20=0
We move all terms containing n to the left, all other terms to the right
10n=20
n=20/10
n=2
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