b-5//14 при b= 5 1//7
5 1/7 - 5/14= 4 11/14
2) (7 1//10z +z): 0,4=4,5
8 1/10z=4.5*0.4
z=18/81*10
z=2 2/9
b-5//14 при b= 5 1//7
5 1/7 - 5/14= 4 11/14
2) (7 1//10z +z): 0,4=4,5
8 1/10z=4.5*0.4
z=18/81*10
z=2 2/9