-n-2n=15

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Solution for -n-2n=15 equation: 



-n-2n=15

We move all terms to the left:

-n-2n-(15)=0

We add all the numbers together, and all the variables

-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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