1) b-5//14 при b= 5 1//7 2) (7 1//10z +z): 0,4=4,5

Question

1) b-5//14 при b= 5 1//7

2) (7 1//10z +z): 0,4=4,5

Answer 1

 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