15=7n-13

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Solution for 15=7n-13 equation: 



15=7n-13

We move all terms to the left:

15-(7n-13)=0

We get rid of parentheses

-7n+13+15=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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