9+n=15-3

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Solution for 9+n=15-3 equation: 



9+n=15-3

We move all terms to the left:

9+n-(15-3)=0

We add all the numbers together, and all the variables

n+9-12=0

We add all the numbers together, and all the variables

n-3=0

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

n=3

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