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56=-4(7n+7)
We move all terms to the left:
56-(-4(7n+7))=0
We calculate terms in parentheses: -(-4(7n+7)), so:We get rid of parentheses
-4(7n+7)
We multiply parentheses
-28n-28
Back to the equation:
-(-28n-28)
28n+28+56=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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