Kareem is three times as old as his son. After ten years, the sum of their ages will be 76 years. Find their present ages.	Choose the correct choice from the following:
A) 13  B) 14  C) 15  D) 16  E) 17
Sol. Let the present age of Kareem’s son be x years.   Then, Kareem’s age = 3x years   After 10 years, Kareem’s age = 3x + 10 years   and Kareem’s son’s age = x + 10 years   ∴ (3x + 10) + (x + 10) = 76   =&gt; 4x = 56 =&gt; x = 14   ∴ Kareem’s present age = 3x = 3 × 14 = 42 years   Kareem’s son’s age = x = 14 years.   Answer 14
<result>B</result>
Kareem is three times as old as his son. After ten years, the sum of their ages will be 76 years. Find their present ages.