- 29 Sep '05 06:22

Let the younger age of John be x*Originally posted by JamesScott***There are two men, John & Peter. John is 2x as old as Peter was when Peter was 2x as old as John. When you add their ages together you get 72.**

How old are they?

2(2x) + (2(2x) + x) = 72

9x = 72

x = 8

John is 32 and Peter is 40 - 29 Sep '05 06:43

x*0.25 + y*0.1 = 4.8*Originally posted by c1arinetboy***I've been doing problems like these in school recently. Here's one:**

A purse containing $4.80 in quarters and dimes has, in all, 30 coins. How many of each coin was there?

x + y = 30

I leave the rest as an exercise for the reader.

(Lol DeBranges)