Ответ:
- \(\frac{x}{y}+\frac{2}{3}=\frac{3x}{3y}+\frac{2y}{3y}=\frac{3x+2y}{3y}\).
- \(\frac{5}{a}+\frac{1}{b}=\frac{5b}{ab}+\frac{a}{ab}=\frac{5b+a}{ab}\).
- \(\frac{c}{7}-\frac{2}{a}=\frac{ac}{7a}-\frac{14}{7a}=\frac{ac-14}{7a}\).
- \(\frac{8}{b}-\frac{a}{c}=\frac{8c}{bc}-\frac{ab}{bc}=\frac{8c-ab}{bc}\).
- \(\frac{ab}{x}-\frac{y}{3}=\frac{3ab}{3x}-\frac{xy}{3x}=\frac{3ab-xy}{3x}\).
- \(\frac{3x}{a}+\frac{2y}{b}=\frac{3bx}{ab}+\frac{2ay}{ab}=\frac{3bx+2ay}{ab}\).
