Answer: Maggie's is 8 years old.
Explanation:
Let the present age of Maggie be 'x' years
Then , as per given , the present age of Maggie's brother will be 2x-3 years .
According to the question :-
Maggi's age + Brother's age = 24
⇒ x+2x-3 = 24
⇒ 3x = 24+3 [Adding 3 on both sides ]
⇒ x = 24÷3 [Dividing by 3 on both sides ]
⇒ x= 8
Hence, Maggie's is 8 years old.