15=n+7-3n

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Solution for 15=n+7-3n equation: 



15=n+7-3n

We move all terms to the left:

15-(n+7-3n)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

2n-7+15=0

We add all the numbers together, and all the variables

2n+8=0

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

2n=-8

n=-8/2

n=-4

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