12=-1/3n+9

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Solution for 12=-1/3n+9 equation: 



12=-1/3n+9

We move all terms to the left:

12-(-1/3n+9)=0



Domain of the equation: 3n+9)!=0

n∈R



We get rid of parentheses

1/3n-9+12=0

We multiply all the terms by the denominator


-9*3n+12*3n+1=0

Wy multiply elements

-27n+36n+1=0

We add all the numbers together, and all the variables

9n+1=0

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

9n=-1

n=-1/9

n=-1/9

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