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5n-8=12+n
We move all terms to the left:
5n-8-(12+n)=0
We add all the numbers together, and all the variables
5n-(n+12)-8=0
We get rid of parentheses
5n-n-12-8=0
We add all the numbers together, and all the variables
4n-20=0
We move all terms containing n to the left, all other terms to the right
4n=20
n=20/4
n=5
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