Решение:
\(\frac{5}{9}\)z - 1\(\frac{1}{4}\)z + \(\frac{17}{18}\)z = \(\frac{5}{9}\)z - \(\frac{5}{4}\)z + \(\frac{17}{18}\)z = \(\frac{20}{36}\)z - \(\frac{45}{36}\)z + \(\frac{34}{36}\)z = \(\frac{20 - 45 + 34}{36}\)z = \(\frac{9}{36}\)z = \(\frac{1}{4}\)z = 0,25z
Ответ: 0,25z