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-13-n=2(n+4)
We move all terms to the left:
-13-n-(2(n+4))=0
We add all the numbers together, and all the variables
-1n-(2(n+4))-13=0
We calculate terms in parentheses: -(2(n+4)), so:We get rid of parentheses
2(n+4)
We multiply parentheses
2n+8
Back to the equation:
-(2n+8)
-1n-2n-8-13=0
We add all the numbers together, and all the variables
-3n-21=0
We move all terms containing n to the left, all other terms to the right
-3n=21
n=21/-3
n=-7
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