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488=8(5-7n)
We move all terms to the left:
488-(8(5-7n))=0
We add all the numbers together, and all the variables
-(8(-7n+5))+488=0
We calculate terms in parentheses: -(8(-7n+5)), so:We get rid of parentheses
8(-7n+5)
We multiply parentheses
-56n+40
Back to the equation:
-(-56n+40)
56n-40+488=0
We add all the numbers together, and all the variables
56n+448=0
We move all terms containing n to the left, all other terms to the right
56n=-448
n=-448/56
n=-8
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