annenkovasofia412

Ответ:

/7x + 2 1/7 = 3 3/28 - 4/7x

4/7x + 5/7x = 3 3/28 - 2 1/7 или 2 4/28

9/7x = 27/28

x = 27/28 : 9/7

x = 3/4

Ответ: x = 3/4.