Question

After 15years,Marys age will be four times of her present age.Find her present age​

Answer 1

Answer:

Let, the present age of Mary is x years. So, after 15 years, she will be (x + 15) years old. Therefore, the present age of Mary is 5 years.

Answer 2

Answer:

let marry age will be 'x'

After 15 yrs her age will be (x+15)

according to following question

x+15=4x

4x-x=15

3x=15

x=15/3

so,

x=5

therefore,

THE PRESENT AGE OF MARY IS 5 YEARS