12x=9+4x-x

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Solution for 12x=9+4x-x equation: 



12x=9+4x-x

We move all terms to the left:

12x-(9+4x-x)=0

We add all the numbers together, and all the variables

12x-(3x+9)=0

We get rid of parentheses

12x-3x-9=0

We add all the numbers together, and all the variables

9x-9=0

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

9x=9

x=9/9

x=1

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