The age of the mother today is thrice that of her daughter. After 12 years, the age of the mother will be twice that of her daughter. The age of the daughter today is?
Note
Let the daughter's age be x years.
Then, the mother's age = 3x years.
⇒ (3x + 12) = 2(x + 12)
⇒ 3x + 12 = 2x + 24
⇒ x = 12.
∴ The daughter's age today is 12 years.