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15=q/3-2
We move all terms to the left:
15-(q/3-2)=0
We get rid of parentheses
-q/3+2+15=0
We multiply all the terms by the denominator
-q+2*3+15*3=0
We add all the numbers together, and all the variables
-1q+51=0
We move all terms containing q to the left, all other terms to the right
-q=-51
q=-51/-1
q=+51
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