B)5\frac{5}{12}(4,8p-4\frac{4}{5}k)-4,5(\frac{4}{9}p-0,4k).

Решение:

\[\frac{65}{12}(4,8p - \frac{24}{5}k) - 4,5(\frac{4}{9}p - 0,4k) = \frac{65}{12} \cdot 4,8p - \frac{65}{12} \cdot \frac{24}{5}k - 4,5 \cdot \frac{4}{9}p + 4,5 \cdot 0,4k\]

\[= \frac{65 \cdot 48}{12 \cdot 10}p - \frac{65 \cdot 24}{12 \cdot 5}k - \frac{45 \cdot 4}{10 \cdot 9}p + \frac{45 \cdot 4}{10 \cdot 10}k = \frac{65 \cdot 4}{10}p - \frac{65 \cdot 2}{5}k - \frac{5 \cdot 4}{10}p + \frac{45 \cdot 4}{100}k\]

\[= \frac{260}{10}p - \frac{130}{5}k - \frac{20}{10}p + \frac{180}{100}k = 26p - 26k - 2p + 1,8k = (26 - 2)p + (-26 + 1,8)k = 24p - 24,2k\]