Question

Amit is now 20 years old and Leela is 4 years old. In how many years will Amit be twice as old as Leela?

Answer 1

Let us suppose that Amit will be twice as old as Leela after x years .

Then , Amit's age will be ( 20 + x )years .

and Leela'sage will be ( 4+ x ) years

At that time , Amit's age will be twice Leela's age ,

$20 + x = 2(4 + x) \\ 20 + x =8 + 2x \\ 20 + x - x = 8 + 2x - x \\ 20 = 8 + x \\ 20 - 8 = 8 + x - 8 \\ 20 = x$
Ans)) After 12 years Amit will be twice as old as Leela.

Answer 2

Answer:

20+x=2(4+x)

20+x=8+2x

20-8=2x-x

12=x

after 12 years