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6n-12=2n+4
We move all terms to the left:
6n-12-(2n+4)=0
We get rid of parentheses
6n-2n-4-12=0
We add all the numbers together, and all the variables
4n-16=0
We move all terms containing n to the left, all other terms to the right
4n=16
n=16/4
n=4
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