-12=3(5-2n)+9n

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Solution for -12=3(5-2n)+9n equation: 



-12=3(5-2n)+9n

We move all terms to the left:

-12-(3(5-2n)+9n)=0

We add all the numbers together, and all the variables

-(3(-2n+5)+9n)-12=0



We calculate terms in parentheses: -(3(-2n+5)+9n), so:

3(-2n+5)+9n

We add all the numbers together, and all the variables

9n+3(-2n+5)

We multiply parentheses

9n-6n+15

We add all the numbers together, and all the variables

3n+15

Back to the equation:

-(3n+15)



We get rid of parentheses

-3n-15-12=0

We add all the numbers together, and all the variables

-3n-27=0

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

-3n=27

n=27/-3

n=-9

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