Решение:
\[ \frac{5}{12} \(\cdot\) 4.8p - \frac{5}{12} \(\cdot\) \frac{4}{5}k \]
\[ \frac{5 \(\cdot\) 48}{12 \(\cdot\) 10}p - \frac{5 \(\cdot\) 4}{12 \(\cdot\) 5}k \]
\[ \frac{240}{120}p - \frac{20}{60}k \]
\[ 2p - \frac{1}{3}k \]
\[ -4.5p + 4.5 \(\cdot\) 0.4k \]
\[ -4.5p + 1.8k \]
\[ 2p - \frac{1}{3}k - 4.5p + 1.8k \]
\[ (2p - 4.5p) + (-\frac{1}{3}k + 1.8k) \]
\[ -2.5p + (1.8 - \frac{1}{3})k \]
\[ -2.5p + (\frac{18}{10} - \frac{1}{3})k \]
\[ -2.5p + (\frac{9}{5} - \frac{1}{3})k \]
\[ -2.5p + (\frac{27 - 5}{15})k \]
\[ -2.5p + \frac{22}{15}k \]
Ответ: -2.5p + \(\frac{22}{15}\)k