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5n=n(-2)+28
We move all terms to the left:
5n-(n(-2)+28)=0
We calculate terms in parentheses: -(n(-2)+28), so:We get rid of parentheses
n(-2)+28
We multiply parentheses
-2n+28
Back to the equation:
-(-2n+28)
5n+2n-28=0
We add all the numbers together, and all the variables
7n-28=0
We move all terms containing n to the left, all other terms to the right
7n=28
n=28/7
n=4
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