4n+9=-2n-9

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Solution for 4n+9=-2n-9 equation: 



4n+9=-2n-9

We move all terms to the left:

4n+9-(-2n-9)=0

We get rid of parentheses

4n+2n+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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