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q/3-13=-6
We move all terms to the left:
q/3-13-(-6)=0
We add all the numbers together, and all the variables
q/3-7=0
We multiply all the terms by the denominator
q-7*3=0
We add all the numbers together, and all the variables
q-21=0
We move all terms containing q to the left, all other terms to the right
q=21
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