36-18-18 7 13

Решение:
$$36\frac{7}{18} - 18\frac{13}{18} = 35\frac{25}{18} - 18\frac{13}{18} = (35-18) + (\frac{25}{18} - \frac{13}{18}) = 17 + \frac{12}{18} = 17\frac{2}{3}$$

Ответ: $$17\frac{2}{3}$$