13=7n-15

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Solution for 13=7n-15 equation: 



13=7n-15

We move all terms to the left:

13-(7n-15)=0

We get rid of parentheses

-7n+15+13=0

We add all the numbers together, and all the variables

-7n+28=0

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

-7n=-28

n=-28/-7

n=+4

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