-12=-3n-3n

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



-12=-3n-3n

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(-6n)-12=0

We get rid of parentheses

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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