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प्रश्न
Fifteen years from now Ravi’s age will be four times his present age. What is Ravi’s present age?
उत्तर
Let Ravi’s present age be x years.
Fifteen years later, Ravi’s age = 4 × His present age
x + 15 = 4x
On transposing x to R.H.S, we obtain
15 = 4x − x
15 = 3x
On dividing both sides by 3, we obtain
`15/3 = (3x)/3`
5 = x
Hence, Ravi’s present age = 5 years
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