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6n-6=3n+30
We move all terms to the left:
6n-6-(3n+30)=0
We get rid of parentheses
6n-3n-30-6=0
We add all the numbers together, and all the variables
3n-36=0
We move all terms containing n to the left, all other terms to the right
3n=36
n=36/3
n=12
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