15=-2n+7n

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Solution for 15=-2n+7n equation: 



15=-2n+7n

We move all terms to the left:

15-(-2n+7n)=0

We add all the numbers together, and all the variables

-(+5n)+15=0

We get rid of parentheses

-5n+15=0

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

-5n=-15

n=-15/-5

n=+3

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