-9+4n=15+12n

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Solution for -9+4n=15+12n equation: 



-9+4n=15+12n

We move all terms to the left:

-9+4n-(15+12n)=0

We add all the numbers together, and all the variables

4n-(12n+15)-9=0

We get rid of parentheses

4n-12n-15-9=0

We add all the numbers together, and all the variables

-8n-24=0

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

-8n=24

n=24/-8

n=-3

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