д) \(1\frac{5}{9} - (s + \frac{4}{9}) = \frac{2}{3}\);
\(\frac{14}{9} - s - \frac{4}{9} = \frac{2}{3}\)
\(\frac{14}{9} - \frac{4}{9} - \frac{2}{3} = s\)
\(\frac{10}{9} - \frac{6}{9} = s\)
\(\frac{4}{9} = s\)
Ответ: \(s = \frac{4}{9}\)