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13n=7n-8+7
We move all terms to the left:
13n-(7n-8+7)=0
We add all the numbers together, and all the variables
13n-(7n-1)=0
We get rid of parentheses
13n-7n+1=0
We add all the numbers together, and all the variables
6n+1=0
We move all terms containing n to the left, all other terms to the right
6n=-1
n=-1/6
n=-1/6
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