12=3-9x

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Solution for 12=3-9x equation: 



12=3-9x

We move all terms to the left:

12-(3-9x)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

9x-3+12=0

We add all the numbers together, and all the variables

9x+9=0

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

9x=-9

x=-9/9

x=-1

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