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0=15+3(n+2)
We move all terms to the left:
0-(15+3(n+2))=0
We add all the numbers together, and all the variables
-(15+3(n+2))=0
We calculate terms in parentheses: -(15+3(n+2)), so:We get rid of parentheses
15+3(n+2)
determiningTheFunctionDomain 3(n+2)+15
We multiply parentheses
3n+6+15
We add all the numbers together, and all the variables
3n+21
Back to the equation:
-(3n+21)
-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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