Question

After 15 years, Mary's age will be four times of her present age.
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Answer 1

Answer:

Let Mary's age be x

15+x = 4x

15 = 4x-x

15 = 3x

15/3 = x

5 = x

her present age is 5 I will follow you if you mark me as brainliest

Answer 2

AnswEr:-

Given:-

• After 15 years Mary's age will be four times of her present age.

To Find:-

• The present age of Mary.

So let the present age of Mary be x years.

Therefore,

After 15 years her age will be (x+15) years.

Also 4 times of her present age will be 4x years.

So ATQ:-

$\\ \tt\mapsto x + 15= 4x \: years. \\ \\ \tt\mapsto4x - x = 15 . \\ \\ \tt\mapsto3x = 15 . \\ \\ \tt\mapsto \: x =\cancel \frac{15}{3} \\ \\ \tt\mapsto x = 5.$

Therefore Mary's present age is x = 5 years.