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-115=-5(-1-4n)
We move all terms to the left:
-115-(-5(-1-4n))=0
We add all the numbers together, and all the variables
-(-5(-4n-1))-115=0
We calculate terms in parentheses: -(-5(-4n-1)), so:We get rid of parentheses
-5(-4n-1)
We multiply parentheses
20n+5
Back to the equation:
-(20n+5)
-20n-5-115=0
We add all the numbers together, and all the variables
-20n-120=0
We move all terms containing n to the left, all other terms to the right
-20n=120
n=120/-20
n=-6
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