9+9n=-9+3n

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



9+9n=-9+3n

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

9n-3n+9+9=0

We add all the numbers together, and all the variables

6n+18=0

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

6n=-18

n=-18/6

n=-3

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