21+3q=39

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Solution for 21+3q=39 equation: 



21+3q=39

We move all terms to the left:

21+3q-(39)=0

We add all the numbers together, and all the variables

3q-18=0

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

3q=18

q=18/3

q=6

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