Boy tablet dosage

Pepík is sick and has to take 1 tablet three times a day. How many days will a pack of 30 tablets last him if he only takes 1 tablet in the morning and evening every third day?

Final Answer:

x =  11 d

Step-by-step explanation:

$$\begin{gathered} T_1=30/(3+3+2)=\frac{15}{4}=3.75 \\ {d}_1=\lfloor T_1\rfloor =\lfloor 3.75\rfloor =3 \\ z=30-d_1\cdot (3+3+2)=30-3\cdot (3+3+2)=6 \\ x=d_1\cdot 3+z/3=3\cdot 3+6/3=11\text{d} \end{gathered}$$

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