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-84=8n+4
We move all terms to the left:
-84-(8n+4)=0
We get rid of parentheses
-8n-4-84=0
We add all the numbers together, and all the variables
-8n-88=0
We move all terms containing n to the left, all other terms to the right
-8n=88
n=88/-8
n=-11
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