12n-9=-3-3n

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Solution for 12n-9=-3-3n equation: 



12n-9=-3-3n

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

12n+3n+3-9=0

We add all the numbers together, and all the variables

15n-6=0

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

15n=6

n=6/15

n=2/5

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