Ответ:

  1. \(\frac{7x}{7y}=\frac{x}{y}\).
  2. \(\frac{2x}{10m}=\frac{x}{5m}\).
  3. \(\frac{mc}{xm}=\frac{c}{x}\).
  4. \(\frac{p^2}{pa}=\frac{p}{a}\).
  5. \(\frac{4ab}{7bc}=\frac{4a}{7c}\).
  6. \(\frac{6ay}{6by}=\frac{a}{b}\).

Ответ: 1) \(\frac{x}{y}\); 2) \(\frac{x}{5m}\); 3) \(\frac{c}{x}\); 4) \(\frac{p}{a}\); 5) \(\frac{4a}{7c}\); 6) \(\frac{a}{b}\).