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84=-6(2n-4)
We move all terms to the left:
84-(-6(2n-4))=0
We calculate terms in parentheses: -(-6(2n-4)), so:We get rid of parentheses
-6(2n-4)
We multiply parentheses
-12n+24
Back to the equation:
-(-12n+24)
12n-24+84=0
We add all the numbers together, and all the variables
12n+60=0
We move all terms containing n to the left, all other terms to the right
12n=-60
n=-60/12
n=-5
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