Question

Leela is Radha’s younger sister. Leela is $4$ years younger than Radha. Can you write Leela’s age in terms of Radha’s age? Take Radha’s age to be $x$ years.

Answer 1

Assume a variable and define a relationship between Leela and Radha's ages :

We have assumed Radha's age to be $x$ years.

As Leela is Radha's younger sister her age must be less than that of Radha.

According to given condition, Leela is $4$ years younger than Radha,

So, Leela's age$=(x-4)$ years

Hence, the Leela's age can be expressed as $(x-4)$ years.