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-104=-4(-7n+5)
We move all terms to the left:
-104-(-4(-7n+5))=0
We calculate terms in parentheses: -(-4(-7n+5)), so:We get rid of parentheses
-4(-7n+5)
We multiply parentheses
28n-20
Back to the equation:
-(28n-20)
-28n+20-104=0
We add all the numbers together, and all the variables
-28n-84=0
We move all terms containing n to the left, all other terms to the right
-28n=84
n=84/-28
n=-3
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