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-n-6n=15-6-8n-8n
We move all terms to the left:
-n-6n-(15-6-8n-8n)=0
We add all the numbers together, and all the variables
-n-6n-(-16n+9)=0
We add all the numbers together, and all the variables
-7n-(-16n+9)=0
We get rid of parentheses
-7n+16n-9=0
We add all the numbers together, and all the variables
9n-9=0
We move all terms containing n to the left, all other terms to the right
9n=9
n=9/9
n=1
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