13=n+7+n

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Solution for 13=n+7+n equation: 



13=n+7+n

We move all terms to the left:

13-(n+7+n)=0

We add all the numbers together, and all the variables

-(2n+7)+13=0

We get rid of parentheses

-2n-7+13=0

We add all the numbers together, and all the variables

-2n+6=0

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

-2n=-6

n=-6/-2

n=+3

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