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
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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