5x = 2
x = 2 : 5
х = 0,4
----------------------
7у = 9 1/3
7у = 28/3
у = 28/3 : 7
у = 4/3
у = 1целая 1/3
-------------------------
z : 2 3/4 = 1 1/11
z = 11/4 * 12/11
z = 3
----------------------------
5 1/2 : t = 3 2/3
t = 5 1/2 : 3 2/3
t = 11/2 : 11/3
t = 3/2
t = 1целая 1/2