Ответ:

(1 2/3х + 6 5/42) : 2 3/4 = 3 1/11

1 2/3х + 6 5/42 = 3 1/11*2 3/4

1 2/3х+ 6 5/42 = 34/11*11/4

1 2/3х + 6 5/42 = 17/2

1 2/3х = 17/2 - 6 5/42 = 17/2 - 257/42 = 357/42-257/42 = 100/42 = 50/21

1 2/3х = 50/21

х= 50/21: 5/3

х= 50/21 * 3/5 = 10/7 = 1 3/7

Пошаговое объяснение: