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15n+9-2n=-17n+9(4n+13)
We move all terms to the left:
15n+9-2n-(-17n+9(4n+13))=0
We add all the numbers together, and all the variables
13n-(-17n+9(4n+13))+9=0
We calculate terms in parentheses: -(-17n+9(4n+13)), so:We get rid of parentheses
-17n+9(4n+13)
We multiply parentheses
-17n+36n+117
We add all the numbers together, and all the variables
19n+117
Back to the equation:
-(19n+117)
13n-19n-117+9=0
We add all the numbers together, and all the variables
-6n-108=0
We move all terms containing n to the left, all other terms to the right
-6n=108
n=108/-6
n=-18
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