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8n-12=5n+12
We move all terms to the left:
8n-12-(5n+12)=0
We get rid of parentheses
8n-5n-12-12=0
We add all the numbers together, and all the variables
3n-24=0
We move all terms containing n to the left, all other terms to the right
3n=24
n=24/3
n=8
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