Question

after 15 years Mary's age will be 4 times of her present age find her present age

Answer 1

hey mate here is your answer

let Mary's present age be x years

then, after 15 years her age will be =x+15

ATQ

mary's age after 15 years = 4x

then, 4x=x+15
=4x-x=15
=3x=15
=x=15/3
=x=5


so, Mary's present age is 5 years


Hope it will help you

Thank you

@Pragya

Answer 2

Answer :

Let the present age of Mary be x years

A. T. Q

After 15 years

Mary's age = 4×present age

x + 15 = 4 × x

x + 15 = 4x

x - 4x = -15

-3x = -15

x = 15/3

x = 5years

★ BE BRAINLY ★