Ответ:

2 2/3.

Пошаговое объяснение:

27 : (31 3/7 - 2 11/14x) = 1 1/8.

31 3/7 - 2 11/14х = 27 : 1 1/8.

31 3/7 - 2 11/14х = 27 : 9/8.

31 3/7 - 2 11/14х = 27 * 8/9.

220/7 - 39/14х = 24.

39/14х = 31 3/7 - 24.

39/14х = 7 3/7.

Х = 7 3/7 : 39/14 = 52/7 * 14/39 = 52 * 2/39 = 4 * 2/3 = 8/3 = 2 2/3.