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