Question

After 12 years, A boy shall be 3 times as old as he was 4 years ago. Find the present age.

Answer 1

Let the present age of the boy be x.

After 12 years,

The boy's age (x+ 12) will be 3 times old as he was 4 years ago [3(x - 4)]

i.e.

x + 12=3(x - 4)

x + 12=3x - 12

2x=14

x=12.

Hence the boy's present age is 12.

I hope this helps you...