15+9n=-12

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Solution for 15+9n=-12 equation: 



15+9n=-12

We move all terms to the left:

15+9n-(-12)=0

We add all the numbers together, and all the variables

9n+27=0

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

9n=-27

n=-27/9

n=-3

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