13=6n+7n

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Solution for 13=6n+7n equation: 



13=6n+7n

We move all terms to the left:

13-(6n+7n)=0

We add all the numbers together, and all the variables

-(+13n)+13=0

We get rid of parentheses

-13n+13=0

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

-13n=-13

n=-13/-13

n=1

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