Решение:

а)

$$rac{17x}{3x - 3} = \frac{17x}{3(x - 1)}$$

$$\frac{11}{6x - 6} = \frac{11}{6(x - 1)}$$

б)

$$\frac{b - 2}{ab + 2a} = \frac{b - 2}{a(b + 2)}$$

$$\frac{a + 2}{2b + b^2} = \frac{a + 2}{b(2 + b)} = \frac{a + 2}{b(b + 2)}$$

в)

$$\frac{5x}{8x + 8y} = \frac{5x}{8(x + y)}$$

$$\frac{9y}{4x + 4y} = \frac{9y}{4(x + y)}$$

г)

$$\frac{x - 3}{x^2 - xy} = \frac{x - 3}{x(x - y)}$$

$$\frac{y - 3}{xy - y^2} = \frac{y - 3}{y(x - y)}$$