9-3x=12-x

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



9-3x=12-x

We move all terms to the left:

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

We add all the numbers together, and all the variables

-3x-(-1x+12)+9=0

We get rid of parentheses

-3x+1x-12+9=0

We add all the numbers together, and all the variables

-2x-3=0

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

-2x=3

x=3/-2

x=-1+1/2

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