X-9=3x-9

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



X-9=3X-9

We move all terms to the left:

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

We get rid of parentheses

X-3X+9-9=0

We add all the numbers together, and all the variables

-2X=0

X=0/-2

X=0

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