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-4n-8=-12n
We move all terms to the left:
-4n-8-(-12n)=0
We get rid of parentheses
-4n+12n-8=0
We add all the numbers together, and all the variables
8n-8=0
We move all terms containing n to the left, all other terms to the right
8n=8
n=8/8
n=1
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