9=-x-2x+9

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



9=-x-2x+9

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

3x-9+9=0

We add all the numbers together, and all the variables

3x=0

x=0/3

x=0

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