B)(4,8p-4)-4,5-0,4k).

в)

\[\frac{5}{12} \cdot (4,8p - \frac{4}{5}) - 4,5 \cdot (\frac{4}{9}p - 0,4k) = \frac{5}{12} \cdot \frac{48}{10}p - \frac{5}{12} \cdot \frac{4}{5} - \frac{45}{10} \cdot \frac{4}{9}p + \frac{45}{10} \cdot \frac{4}{10}k = \frac{2}{1} \cdot \frac{4}{10}p - \frac{1}{3} - \frac{5}{1} \cdot \frac{4}{10}p + \frac{9}{1} \cdot \frac{4}{100}k = \frac{4}{5}p - \frac{1}{3} - 2p + \frac{9}{25}k\]

\[\frac{4}{5}p - 2p + \frac{9}{25}k - \frac{1}{3} = \frac{4}{5}p - \frac{10}{5}p + \frac{9}{25}k - \frac{1}{3} = -\frac{6}{5}p + \frac{9}{25}k - \frac{1}{3}\]

Не уверен в ответе!