Tom is 3 times as old as Manny. In 4 years the sum of their ages will be 56. How old are Tom and Manny?

Tom is 39, and Manny is 13.

x = Manny's age

3x + x = 56

[Tom's age (which is 3 times Manny's} + Manny's age = sum of their ages]

4x = 56 Divide 4 on both sides

x = 14

Manny is 14 years old

Tom is 42

[42 + 14 = 56]