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6n-20=2n-12
We move all terms to the left:
6n-20-(2n-12)=0
We get rid of parentheses
6n-2n+12-20=0
We add all the numbers together, and all the variables
4n-8=0
We move all terms containing n to the left, all other terms to the right
4n=8
n=8/4
n=2
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