Semester mathematics

Assuming that the original drug effect is X 5 days, that is, 5xA becomes 1.5 times, that is, 1.5X is one-third of the original X, then the total is 1.5X+ one-third, and X= 5.5 x divided by 5.5 X= required days, and the result is 2.7 days, that is, three days.

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