15=-n-2n

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Solution for 15=-n-2n equation: 



15=-n-2n

We move all terms to the left:

15-(-n-2n)=0

We add all the numbers together, and all the variables

-(-3n)+15=0

We get rid of parentheses

3n+15=0

We move all terms containing n to the left, all other terms to the right

3n=-15

n=-15/3

n=-5

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