190. б) 1\frac{3}{5}y - 2\frac{4}{15}y = \frac{1}{10} - 3\frac{11}{30} + 1\frac{7}{15}

1. Convert mixed numbers to improper fractions: \(\frac{8}{5}y - \frac{34}{15}y = \frac{1}{10} - \frac{101}{30} + \frac{22}{15}\).
2. Combine like terms: \(\frac{24y - 34y}{15} = \frac{3 - 101 + 44}{30}\) which simplifies to \(-\frac{10y}{15} = -\frac{54}{30}\).
3. Solve for y: \(-\frac{2}{3}y = -\frac{9}{5}\) => \(y = -\frac{9}{5} \times -\frac{3}{2} = \frac{27}{10}\).