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

Let Ravi’s present age be x years. After fifteen years, Ravi’s age = 4x years.
Fifteen years from now, Ravi’s age = (x+15) years.
According to question, 4x=x+15
⇒ 4x-x=15 [Transposing x to L.H.S.]
⇒ 3x=15
⇒ 3x/3=15/3 [Dividing both sides by 3]
⇒ x=5 years

Hence, Ravi’s present age be 5 years.

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