Question 1110925: Vicky is now 4 times as old as Cristy. Five years ago, the sum of their ages was 45. How old are they now? Answer by ikleyn(52787) (Show Source):
5 years ago the sum of their ages was 45 ===> now it is 45 + 2*5 = 55.
So we have two numbers, the sum is 55 and one is 4 times the other.
Hence, the numbers are 44 and 11 (easy mental exercise).