2. Решите уравнения 3 7 1) 2음 + x = 4: 11 3 11 ②x-3= 20; 3) 3x =

Ответ: x = 2 4/11

1. Уравнение 1

\[2 \frac{3}{11} + x = 4 \frac{7}{11}\] \[x = 4 \frac{7}{11} - 2 \frac{3}{11}\] \[x = (4 - 2) + (\frac{7}{11} - \frac{3}{11})\] \[x = 2 + \frac{4}{11}\] \[x = 2 \frac{4}{11}\]

Ответ: x = 6 1/5

1. Уравнение 2

\[x - 3 \frac{2}{5} = 2 \frac{3}{5}\] \[x = 2 \frac{3}{5} + 3 \frac{2}{5}\] \[x = (2 + 3) + (\frac{3}{5} + \frac{2}{5})\] \[x = 5 + \frac{5}{5}\] \[x = 5 + 1\] \[x = 6\]

Ответ: x = 3/11

1. Уравнение 3

\[3 \frac{1}{3} x = \frac{10}{11}\] \[\frac{10}{3} x = \frac{10}{11}\] \[x = \frac{10}{11} : \frac{10}{3}\] \[x = \frac{10}{11} \cdot \frac{3}{10}\] \[x = \frac{3}{11}\]

Ответ: 3/11