Question

помогите пожалуйста.........​

Answer 1

0.(7) = х

7.(7) = 10х

10х - х = 7.(7) - 0.(7)

9х = 7

х = 7/9

1.(7) + 3 7/9 = 1 7/9 + 3 7/9 = 4 14/9 = 5 5/9 = 5.(5)

1.(8) + 4 7/9 = 1 8/9 + 4 7/9 = 5 15/9 = 6 6/9 = 6 2/3 = 6.(6)