-9n+-n+7n=12

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Solution for -9n+-n+7n=12 equation: 



-9n+-n+7n=12

We move all terms to the left:

-9n+-n+7n-(12)=0

determiningTheFunctionDomain
-9n-n+7n-12+=0

We add all the numbers together, and all the variables

-3n=0

n=0/-3

n=0

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