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