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-12=n/3+2
We move all terms to the left:
-12-(n/3+2)=0
We get rid of parentheses
-n/3-2-12=0
We multiply all the terms by the denominator
-n-2*3-12*3=0
We add all the numbers together, and all the variables
-1n-42=0
We move all terms containing n to the left, all other terms to the right
-n=42
n=42/-1
n=-42
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