12n+6=-3n-9

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Solution for 12n+6=-3n-9 equation: 



12n+6=-3n-9

We move all terms to the left:

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

We get rid of parentheses

12n+3n+9+6=0

We add all the numbers together, and all the variables

15n+15=0

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

15n=-15

n=-15/15

n=-1

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