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5n-12=2n+6
We move all terms to the left:
5n-12-(2n+6)=0
We get rid of parentheses
5n-2n-6-12=0
We add all the numbers together, and all the variables
3n-18=0
We move all terms containing n to the left, all other terms to the right
3n=18
n=18/3
n=6
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