Question

помогите пожалуйста​

Answer 1

4 = 4/1 = 20/5

6 = 6/1 = 30/5

18 = 18/1 = 90/5

20 = 20/1 = 100/5

31 = 31/1 = 155/5

71 = 71/1 = 355/5