x-9=2x+9

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



x-9=2x+9

We move all terms to the left:

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

We get rid of parentheses

x-2x-9-9=0

We add all the numbers together, and all the variables

-1x-18=0

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

-x=18

x=18/-1

x=-18

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