12x+9=3x-3

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



12x+9=3x-3

We move all terms to the left:

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

We get rid of parentheses

12x-3x+3+9=0

We add all the numbers together, and all the variables

9x+12=0

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

9x=-12

x=-12/9

x=-1+1/3

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