-2x-9=9+x

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



-2x-9=9+x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-2x-x-9-9=0

We add all the numbers together, and all the variables

-3x-18=0

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

-3x=18

x=18/-3

x=-6

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