-3n+n+8=12

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Solution for -3n+n+8=12 equation: 



-3n+n+8=12

We move all terms to the left:

-3n+n+8-(12)=0

We add all the numbers together, and all the variables

-2n-4=0

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

-2n=4

n=4/-2

n=-2

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