5n-15=7n+15

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Solution for 5n-15=7n+15 equation: 



5n-15=7n+15

We move all terms to the left:

5n-15-(7n+15)=0

We get rid of parentheses

5n-7n-15-15=0

We add all the numbers together, and all the variables

-2n-30=0

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

-2n=30

n=30/-2

n=-15

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