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10n=3n+12
We move all terms to the left:
10n-(3n+12)=0
We get rid of parentheses
10n-3n-12=0
We add all the numbers together, and all the variables
7n-12=0
We move all terms containing n to the left, all other terms to the right
7n=12
n=12/7
n=1+5/7
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