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-8n+17=-7n-9
We move all terms to the left:
-8n+17-(-7n-9)=0
We get rid of parentheses
-8n+7n+9+17=0
We add all the numbers together, and all the variables
-1n+26=0
We move all terms containing n to the left, all other terms to the right
-n=-26
n=-26/-1
n=+26
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