12=3q+9q

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Solution for 12=3q+9q equation: 



12=3q+9q

We move all terms to the left:

12-(3q+9q)=0

We add all the numbers together, and all the variables

-(+12q)+12=0

We get rid of parentheses

-12q+12=0

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

-12q=-12

q=-12/-12

q=1

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