X-2x-3=9

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Solution for X-2x-3=9 equation: 



X-2X-3=9

We move all terms to the left:

X-2X-3-(9)=0

We add all the numbers together, and all the variables

-1X-12=0

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

-X=12

X=12/-1

X=-12

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