12n+9=6+-3n

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



12n+9=6+-3n

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

12n+3n+9=0

We add all the numbers together, and all the variables

15n+9=0

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

15n=-9

n=-9/15

n=-3/5

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