Szczegółowe wyjaśnienie:
[tex] \frac{15}{7} \times \frac{21}{10} - \frac{4}{9} + \frac{74}{10} \times \frac{40}{37} = \frac{9}{2} - \frac{4}{9} + 8 = 4.5 - \frac{4}{9} + 8 = 12.5 - \frac{4}{9} = 12 \frac{9}{18} - \frac{8}{18} = 12 \frac{1}{18} [/tex]
