Verified answer

Ответ:

x = 3

Пошаговое объяснение:

4/5 - 1/20 = 3/4

2/3 / 3/4 = 8/9

4/9 + 8/9 = 4/3

4/9 x = 4/3

1/9 x = 1/3

x = 3