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(n+12)2=8n
We move all terms to the left:
(n+12)2-(8n)=0
We add all the numbers together, and all the variables
-8n+(n+12)2=0
We multiply parentheses
-8n+2n+24=0
We add all the numbers together, and all the variables
-6n+24=0
We move all terms containing n to the left, all other terms to the right
-6n=-24
n=-24/-6
n=+4
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