2n+9-4n=-15

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Solution for 2n+9-4n=-15 equation: 



2n+9-4n=-15

We move all terms to the left:

2n+9-4n-(-15)=0

We add all the numbers together, and all the variables

-2n+24=0

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

-2n=-24

n=-24/-2

n=+12

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