4x+9=-2x-9

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



4x+9=-2x-9

We move all terms to the left:

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

We get rid of parentheses

4x+2x+9+9=0

We add all the numbers together, and all the variables

6x+18=0

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

6x=-18

x=-18/6

x=-3

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