Ответ:
\(0,75=\frac{3}{4}\).
\[\frac{1}{5}:\frac{3}{4}=\frac{1}{5}\cdot\frac{4}{3}=\frac{4}{15}.\]
\[\frac{4}{15}+3=\frac{4}{15}+\frac{45}{15}=\frac{49}{15}=3\frac{4}{15}.\]
Ответ: \(\frac{49}{15}\).
\(0,75=\frac{3}{4}\).
\[\frac{1}{5}:\frac{3}{4}=\frac{1}{5}\cdot\frac{4}{3}=\frac{4}{15}.\]
\[\frac{4}{15}+3=\frac{4}{15}+\frac{45}{15}=\frac{49}{15}=3\frac{4}{15}.\]
Ответ: \(\frac{49}{15}\).