10q-9=21

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Solution for 10q-9=21 equation: 



10q-9=21

We move all terms to the left:

10q-9-(21)=0

We add all the numbers together, and all the variables

10q-30=0

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

10q=30

q=30/10

q=3

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