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5n+27=3n+57
We move all terms to the left:
5n+27-(3n+57)=0
We get rid of parentheses
5n-3n-57+27=0
We add all the numbers together, and all the variables
2n-30=0
We move all terms containing n to the left, all other terms to the right
2n=30
n=30/2
n=15
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