-3x-9=x-9

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Solution for -3x-9=x-9 equation: 



-3x-9=x-9

We move all terms to the left:

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

We get rid of parentheses

-3x-x+9-9=0

We add all the numbers together, and all the variables

-4x=0

x=0/-4

x=0

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