Решим уравнения:
1) $$3 \frac{2}{17} - x = \frac{7}{51}$$
$$\frac{53}{17} - x = \frac{7}{51}$$
$$x = \frac{53}{17} - \frac{7}{51}$$
$$x = \frac{53 * 3}{17 * 3} - \frac{7}{51}$$
$$x = \frac{159}{51} - \frac{7}{51}$$
$$x = \frac{152}{51}$$
$$x = 2 \frac{50}{51}$$
Ответ: $$x = 2 \frac{50}{51}$$
2) $$x : 1 \frac{3}{13} = \frac{26}{27}$$
$$x : \frac{16}{13} = \frac{26}{27}$$
$$x = \frac{26}{27} * \frac{16}{13}$$
$$x = \frac{2 * 16}{27}$$
$$x = \frac{32}{27}$$
$$x = 1 \frac{5}{27}$$
Ответ: $$x = 1 \frac{5}{27}$$
3) $$\frac{x}{9} = \frac{8}{45}$$
$$x = \frac{8}{45} * 9$$
$$x = \frac{8}{5}$$
$$x = 1 \frac{3}{5}$$
Ответ: $$x = 1 \frac{3}{5}$$