Пусть x - искомое число. Тогда:
\(4 \frac{5}{6} - x = 5 \frac{13}{18} - 3 \frac{7}{36}\)
\(4 \frac{5}{6} - x = 5 \frac{26}{36} - 3 \frac{7}{36}\)
\(4 \frac{5}{6} - x = 2 \frac{19}{36}\)
\(x = 4 \frac{5}{6} - 2 \frac{19}{36}\)
\(x = 4 \frac{30}{36} - 2 \frac{19}{36}\)
\(x = 2 \frac{11}{36}\)