2x+x+12=9x-12

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Solution for 2x+x+12=9x-12 equation: 



2x+x+12=9x-12

We move all terms to the left:

2x+x+12-(9x-12)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

3x-9x+12+12=0

We add all the numbers together, and all the variables

-6x+24=0

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

-6x=-24

x=-24/-6

x=+4

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