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-9-1=-8n
We move all terms to the left:
-9-1-(-8n)=0
We add all the numbers together, and all the variables
-(-8n)-10=0
We get rid of parentheses
8n-10=0
We move all terms containing n to the left, all other terms to the right
8n=10
n=10/8
n=1+1/4
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