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-12-n=2n+3
We move all terms to the left:
-12-n-(2n+3)=0
We add all the numbers together, and all the variables
-1n-(2n+3)-12=0
We get rid of parentheses
-1n-2n-3-12=0
We add all the numbers together, and all the variables
-3n-15=0
We move all terms containing n to the left, all other terms to the right
-3n=15
n=15/-3
n=-5
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