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23=-7n+12
We move all terms to the left:
23-(-7n+12)=0
We get rid of parentheses
7n-12+23=0
We add all the numbers together, and all the variables
7n+11=0
We move all terms containing n to the left, all other terms to the right
7n=-11
n=-11/7
n=-1+4/7
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