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20=3+q/5
We move all terms to the left:
20-(3+q/5)=0
We add all the numbers together, and all the variables
-(q/5+3)+20=0
We get rid of parentheses
-q/5-3+20=0
We multiply all the terms by the denominator
-q-3*5+20*5=0
We add all the numbers together, and all the variables
-1q+85=0
We move all terms containing q to the left, all other terms to the right
-q=-85
q=-85/-1
q=+85
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