12+3n=-6+6n-3

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Solution for 12+3n=-6+6n-3 equation: 



12+3n=-6+6n-3

We move all terms to the left:

12+3n-(-6+6n-3)=0

We add all the numbers together, and all the variables

3n-(6n-9)+12=0

We get rid of parentheses

3n-6n+9+12=0

We add all the numbers together, and all the variables

-3n+21=0

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

-3n=-21

n=-21/-3

n=+7

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