-3x+6x=12-x

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Solution for -3x+6x=12-x equation: 



-3x+6x=12-x

We move all terms to the left:

-3x+6x-(12-x)=0

We add all the numbers together, and all the variables

-3x+6x-(-1x+12)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

3x+1x-12=0

We add all the numbers together, and all the variables

4x-12=0

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

4x=12

x=12/4

x=3

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