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-108=-3n+5(4+7n)
We move all terms to the left:
-108-(-3n+5(4+7n))=0
We add all the numbers together, and all the variables
-(-3n+5(7n+4))-108=0
We calculate terms in parentheses: -(-3n+5(7n+4)), so:We get rid of parentheses
-3n+5(7n+4)
We multiply parentheses
-3n+35n+20
We add all the numbers together, and all the variables
32n+20
Back to the equation:
-(32n+20)
-32n-20-108=0
We add all the numbers together, and all the variables
-32n-128=0
We move all terms containing n to the left, all other terms to the right
-32n=128
n=128/-32
n=-4
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