3x-9=12-8x

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Solution for 3x-9=12-8x equation: 



3x-9=12-8x

We move all terms to the left:

3x-9-(12-8x)=0

We add all the numbers together, and all the variables

3x-(-8x+12)-9=0

We get rid of parentheses

3x+8x-12-9=0

We add all the numbers together, and all the variables

11x-21=0

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

11x=21

x=21/11

x=1+10/11

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