ben is three times as old as zain. 4 years ago ben was 5 times as old as zain. how old is zain now

Answer 1

B= 3Z

B-4 = 5(Z-4)

3Z-4 = 5Z- 20

2Z = 16

Z = 16/2 = 8 years old for Zain now

B= 3(8) = 24 years old for Ben now

4 years ago they were 4 and 20

20 =5 times 4