1. $$-2,3b = 11\frac{1}{2}$$
$$-2,3b = \frac{23}{2}$$
$$b = \frac{23}{2} : (-2,3)$$
$$b = \frac{23}{2} : \left(-\frac{23}{10}\right)$$
$$b = \frac{23}{2} \cdot \left(-\frac{10}{23}\right)$$
$$b = -\frac{23 \cdot 10}{2 \cdot 23}$$
$$b = -\frac{10}{2}$$
$$b = -5$$
2. $$-4,42 : b = \frac{1}{5}$$
$$\frac{-442}{100} : b = \frac{1}{5}$$
$$\frac{-221}{50} : b = \frac{1}{5}$$
$$b = \frac{-221}{50} : \frac{1}{5}$$
$$b = \frac{-221}{50} \cdot 5$$
$$b = \frac{-221}{10}$$
$$b = -22,1$$