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20n+72=8n+2
We move all terms to the left:
20n+72-(8n+2)=0
We get rid of parentheses
20n-8n-2+72=0
We add all the numbers together, and all the variables
12n+70=0
We move all terms containing n to the left, all other terms to the right
12n=-70
n=-70/12
n=-5+5/6
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