X-3-3x=9

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



X-3-3X=9

We move all terms to the left:

X-3-3X-(9)=0

We add all the numbers together, and all the variables

-2X-12=0

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

-2X=12

X=12/-2

X=-6

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