Ответ:
8,1
Пошаговое объяснение:
4/9*у+1/3*у=63/10
4/9*у+3/9*у=63/10
7/9у=63/10
у=63/10:7/9
у=63/10×9/7
у=81/10
у=8,1
(1/3)·16=16/48
(3/4)·12=36/48
(5/6)·8=40/48
(3/8)·6=18/48
(11/12)·4=44/48
(13/16)·3=39/48
(23/24)·2=46/48