10 целых 11/12 - (м+3 целых 2/15)=6 целых 4/15 (15- 4 целых 3/-3 целых 8/15)=

10 11/12 -(m+3 2/15) = 6 4/15 

m+ 3 2/15 = 10 11/12 - 6 4/15

m+3 2/15=4 55-16/60

m+3 2/15=4 39/60
m=4 39/60 - 3 2/15 
m=1 39-8/60

m=1 31/60



1) 14 20/20 - 4 3/20= 10 16/20
2)11 15/15- 3 8/15 = 8 7/15
3) 10 16/20- 8 7/15 = 2 48-28/60 = 2 20/60 =2 1/3