а : 7/13 = 39 х : 2 13/16 = 4/9
а = 39 · 7/13 х : 45/16 = 4/9
а = 3 · 7 х = 4/9 · 45/16 = (1·5)/(1·4)
а = 21 х = 5/4 = 1 целая 1/4
Проверка: Проверка:
21 : 7/13 = 39 5/4 : 45/16 = 4/9
21 · 13/7 = 39 5/4 · 16/45 = 4/9
3 · 13 = 39 (1·4)/(1·9) = 4/9
а : 7/13 = 39 х : 2 13/16 = 4/9
а = 39 · 7/13 х : 45/16 = 4/9
а = 3 · 7 х = 4/9 · 45/16 = (1·5)/(1·4)
а = 21 х = 5/4 = 1 целая 1/4
Проверка: Проверка:
21 : 7/13 = 39 5/4 : 45/16 = 4/9
21 · 13/7 = 39 5/4 · 16/45 = 4/9
3 · 13 = 39 (1·4)/(1·9) = 4/9