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100=12n-4n+12
We move all terms to the left:
100-(12n-4n+12)=0
We add all the numbers together, and all the variables
-(8n+12)+100=0
We get rid of parentheses
-8n-12+100=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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