12+6x=9+3x

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Solution for 12+6x=9+3x equation: 



12+6x=9+3x

We move all terms to the left:

12+6x-(9+3x)=0

We add all the numbers together, and all the variables

6x-(3x+9)+12=0

We get rid of parentheses

6x-3x-9+12=0

We add all the numbers together, and all the variables

3x+3=0

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

3x=-3

x=-3/3

x=-1

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