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20=n/2+16
We move all terms to the left:
20-(n/2+16)=0
We get rid of parentheses
-n/2-16+20=0
We multiply all the terms by the denominator
-n-16*2+20*2=0
We add all the numbers together, and all the variables
-1n+8=0
We move all terms containing n to the left, all other terms to the right
-n=-8
n=-8/-1
n=+8
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