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20=4n+8+8n
We move all terms to the left:
20-(4n+8+8n)=0
We add all the numbers together, and all the variables
-(12n+8)+20=0
We get rid of parentheses
-12n-8+20=0
We add all the numbers together, and all the variables
-12n+12=0
We move all terms containing n to the left, all other terms to the right
-12n=-12
n=-12/-12
n=1
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