Question

shraddha is 40 years old and smita is 20 years old how many years ago was shraddha three times as old as sunita

Answer 1

$40 - x = 3(20 - x) \\ 40 - x = 60 - 3x \\ 2x = 60 - 40 \\ 2x = 20 \\ x = 10$
10 year ago is the right answer

Answer 2

Answer:

10 years ago Shraddha was three times as old as Smita

Step-by-step explanation:

Given ,

Age of Shraddha = 40 years

Age of Smita = 20 years

Let  ' x ' years ago Shraddha was three times as old as Smita

Age of Shraddha x years ago = 40 - x

Age of Smita x years ago = 20 - x

Given,

Age of Shraddha was 3 times age of Smita

40 - x = 3 ( 20 - x )

40 - x = 60 - 3x

3x - x = 60 - 40

2x = 20

x = 20 / 2

x = 10

Hence,

10 years ago Shraddha was three times as old as Smita