3. Решите уравнение т 2 11m=9,9.

$$m-\frac{2}{11}m = 9,9$$

$$\frac{11}{11}m - \frac{2}{11}m = 9,9$$

$$\frac{9}{11}m = 9,9$$

$$m = 9,9 : \frac{9}{11}$$

$$m = 9,9 \cdot \frac{11}{9}$$

$$m = \frac{99}{10} \cdot \frac{11}{9}$$

$$m = \frac{11}{10} \cdot 11 = \frac{121}{10} = 12,1$$

Ответ: 12,1