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-12=5n+8
We move all terms to the left:
-12-(5n+8)=0
We get rid of parentheses
-5n-8-12=0
We add all the numbers together, and all the variables
-5n-20=0
We move all terms containing n to the left, all other terms to the right
-5n=20
n=20/-5
n=-4
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