3x-x=12+6x

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



3x-x=12+6x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

2x-(6x+12)=0

We get rid of parentheses

2x-6x-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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