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13=n/9
We move all terms to the left:
13-(n/9)=0
We add all the numbers together, and all the variables
-(+n/9)+13=0
We get rid of parentheses
-n/9+13=0
We multiply all the terms by the denominator
-n+13*9=0
We add all the numbers together, and all the variables
-1n+117=0
We move all terms containing n to the left, all other terms to the right
-n=-117
n=-117/-1
n=+117
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