9q-21=6

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Solution for 9q-21=6 equation: 



9q-21=6

We move all terms to the left:

9q-21-(6)=0

We add all the numbers together, and all the variables

9q-27=0

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

9q=27

q=27/9

q=3

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