Verified answer

Ответ:

Пошаговое объяснение:

x - 2 1/9 = 12 2/3

x = 12 2/3 + 2 1/9

x = 12 6/9 + 2 1/9

x = 14 7/9

------------------------------

x - 6 1/3 = 7 1/4

x = 7 1/4 + 6 1/3

x = 7 3/12 + 6 4/12

x = 13 7/12

-------------------------

x - 13 4/15 = 4 2/5

x = 4 2/5 + 13 4/15

x = 4 6/15 + 13 4/15

x = 17 10/15

x = 17 2/3

----------------------

x - 2 3/5 = 12 1/6

x = 12 1/6 + 2 3/5

x = 12 5/30 + 2 18/30

x = 14 23/30

=====================