If the length is 1m less that double the width and the area is 21 then the length would be 15 and the width will be 8, i think.
It makes a rectangle if graphed.
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Answer:

Step-by-step explanation:
Given the expression:

We are to find the quotient as shown:

Hence the correct answer is 
On the 21st day; the 7th day of the back medication and the 3rd day of the asthma medication.