A) 8 8/11-z=3 9/11 б) y-4 3/5=2 4/5 в) 8 16/27-(x-2 17/27)= 8 5/27

8 8/11 - z = 3 9/11                  y- 4 3/5=2 4/5                                
z= 8 8/11 - 3 9/11                    y=2 4/5 + 4 3/5
z=7 19/11 - 3 9/11                    y= 6 7/5= 7 2/5                            
z = 4 10/11

8 16/27 - ( x - 2 17/27) = 8 5/27
x - 2 17/27=8 16/27- 8 5/27
x- 2 17/27= 11/27
x = 11/27+ 2 17/27
x = 2 28/27= 3 1/27