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13=n.5
We move all terms to the left:
13-(n.5)=0
We add all the numbers together, and all the variables
-(+n.5)+13=0
We get rid of parentheses
-n.5+13=0
We move all terms containing n to the left, all other terms to the right
-n.5=-13
n=-13/1
n=-13
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