X-9=2x-20

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Solution for X-9=2x-20 equation: 



X-9=2X-20

We move all terms to the left:

X-9-(2X-20)=0

We get rid of parentheses

X-2X+20-9=0

We add all the numbers together, and all the variables

-1X+11=0

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

-X=-11

X=-11/-1

X=+11

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