2n+6=5n-15.

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Solution for 2n+6=5n-15. equation: 



2n+6=5n-15.

We move all terms to the left:

2n+6-(5n-15.)=0

We add all the numbers together, and all the variables

2n-(5n-15)+6=0

We get rid of parentheses

2n-5n+15+6=0

We add all the numbers together, and all the variables

-3n+21=0

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

-3n=-21

n=-21/-3

n=+7

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