y = 2/3 : 5/7
y = 14/15
2/9 + y = 5/3
y = 5/3 - 2/9
y = 13/9
5/7 x y= 2/3
y = 2/3 : 5/7
y = 14/15
2/9 + y=1+2/3
2/9 + y= 5/3
y = 5/3 - 2/9
y = 13/9
5/7 x y = 2/3
y = 5/7 : 2/3
y = 14/15
vậy y = ...
2/9 + y = 1 + 2/3
2/9 + y = 5/3
y = 5/3 - 2/9
y = 13/9
vậy y = ...
5/7 x y= 2/3
y = 2/3 : 5/7
y = 14/15
2/9 + y= 1+2/3
2/9 + y= 5/3
y = 5/3 - 2/9
y = 13/9