3n+-3=-15

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



3n+-3=-15

We move all terms to the left:

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

We add all the numbers together, and all the variables

3n+12=0

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

3n=-12

n=-12/3

n=-4

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