-9=3+2n+4n

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Solution for -9=3+2n+4n equation: 



-9=3+2n+4n

We move all terms to the left:

-9-(3+2n+4n)=0

We add all the numbers together, and all the variables

-(6n+3)-9=0

We get rid of parentheses

-6n-3-9=0

We add all the numbers together, and all the variables

-6n-12=0

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

-6n=12

n=12/-6

n=-2

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