4 1/3:2х=1,3:3
13/3:2х=1 3/10:3
13/3:2х=13/10:3
3*13/3=2х*13/10
13=13/5х
-13/5х= -13
х= -13:(-13/5)
х= -13*(-5/13)
х=5
.............................
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!x=6/7!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
А чего решать :-):-):-):-):-):-):-):-)