Ответ:

  1. \(x=\frac{6}{10}-\frac{2}{5}=\frac{3}{5}-\frac{2}{5}=\frac{1}{5}\).
  2. \(y=\frac{4}{15}+\frac{3}{10}=\frac{8}{30}+\frac{9}{30}=\frac{17}{30}\).

Ответ: а) \(x=\frac{1}{5}\); б) \(y=\frac{17}{30}\).