Question

Fifteen years from now Ravi’s age will be four times his present age. What is Ravi’s present age?​

Answer 1

Let Ravi's present age be x years.

After 15 years, his age will be (x+15) years.

It is given that after 15 years, Ravi's age will be four times his present age.

4x=x+15

⇒4x−x=15

⇒3x=15

⇒x=

3

15

=5

Hence, Ravi's present age is 5 years.

Answer 2

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Let Ravi's present age be x years.

After 15 years, his age will be (x+15) years.

It is given that after 15 years, Ravi's age will be four times his present age.

∴4x=x+15

⇒4x−x=15

⇒3x=15

⇒$x = \frac{15}{3} = 5$

Hence, Ravi's present age is 5 years.