\[\left( 4,8\ :\frac{4}{7} - 2,8 \cdot \frac{4}{7} \right)\ :0,6 =\]
\[= \left( \frac{48 \cdot 7}{10 \cdot 4} - \frac{28 \cdot 4}{10 \cdot 7} \right)\ :\frac{6}{10} =\]
\[= \left( \frac{42}{5} - \frac{8}{5} \right)\ :\frac{3}{5} =\]
\[= \frac{34 \cdot 5}{5 \cdot 3} = \frac{34}{3} = 11\frac{1}{3} - число.\]