-3+5n=2n+15

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Solution for -3+5n=2n+15 equation: 



-3+5n=2n+15

We move all terms to the left:

-3+5n-(2n+15)=0

We get rid of parentheses

5n-2n-15-3=0

We add all the numbers together, and all the variables

3n-18=0

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

3n=18

n=18/3

n=6

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