Question

after 15 years Mary's age will be four time of her present age find her present age​

Answer 1

let Mary present age be x years

after 15 years her age is (x+15)

ATQ

(x+15)=4x

x-4x=-15

-3x=-15

x=5

present age of Mary is 5 years

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Answer 2

Answer:

5

Step-by-step explanation:

Let her present age be x

After 15 years her age 15+ x

Four time her present age 4x

According to the question 15 + x = 4x

15=4x-x

15=3x

15/3 = x

5 = x

Therefore her present age is 5 years