\[= \left( - \frac{1 \cdot 1}{1 \cdot 2} + \frac{2 \cdot 1}{1 \cdot 1} \right) \cdot \left( - \frac{24}{10} \right) =\]
\[= \left( - \frac{1}{2} + 2 \right) \cdot \left( - \frac{24}{10} \right) =\]
\[= \frac{3}{2} \cdot \left( - \frac{12}{5} \right) = - \frac{3 \cdot 12}{1 \cdot 10} =\]
\[= - \frac{36}{10} = - 3,6.\]