Ответ:

  1. а) \(x=\frac{3}{5}-\frac{1}{8}=\frac{24-5}{40}=\frac{19}{40}\).
  2. б) \(x=\frac{5}{12}-\frac{1}{3}=\frac{5}{12}-\frac{4}{12}=\frac{1}{12}\).
  3. в) \(x=\frac{1}{5}+\frac{3}{20}=\frac{4}{20}+\frac{3}{20}=\frac{7}{20}\).
  4. г) \(x=\frac{4}{21}+\frac{3}{7}=\frac{4}{21}+\frac{9}{21}=\frac{13}{21}\).
  5. д) \(x=\frac{4}{5}-\frac{1}{6}=\frac{24-5}{30}=\frac{19}{30}\).
  6. е) \(x=\frac{5}{8}-\frac{1}{3}=\frac{15-8}{24}=\frac{7}{24}\).

Ответ: а) \(\frac{19}{40}\); б) \(\frac{1}{12}\); в) \(\frac{7}{20}\); г) \(\frac{13}{21}\); д) \(\frac{19}{30}\); е) \(\frac{7}{24}\).