Решим уравнение:
$$3.2 : (0.1x + 1) = \frac{6}{5}$$
$$3.2 = \frac{6}{5} \cdot (0.1x + 1)$$
$$3.2 \cdot 5 = 6 \cdot (0.1x + 1)$$
$$16 = 0.6x + 6$$
$$16 - 6 = 0.6x$$
$$10 = 0.6x$$
$$x = \frac{10}{0.6} = \frac{100}{6} = \frac{50}{3}$$
$$x = 16\frac{2}{3}$$
Ответ: $$x = 16\frac{2}{3}$$