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5(3+4n)=-13(1-n)
We move all terms to the left:
5(3+4n)-(-13(1-n))=0
We add all the numbers together, and all the variables
5(4n+3)-(-13(-1n+1))=0
We multiply parentheses
20n-(-13(-1n+1))+15=0
We calculate terms in parentheses: -(-13(-1n+1)), so:We get rid of parentheses
-13(-1n+1)
We multiply parentheses
13n-13
Back to the equation:
-(13n-13)
20n-13n+13+15=0
We add all the numbers together, and all the variables
7n+28=0
We move all terms containing n to the left, all other terms to the right
7n=-28
n=-28/7
n=-4
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