SOLUTION: Arturo is three times as old as his son. In five years, Arturo will be two and a half times as old as his son. What are their ages?

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Question 800373: Arturo is three times as old as his son. In five years, Arturo will be two and a half times as old as his son. What are their ages?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Arturo is three times as old as his son.
a = 3s
:
In five years, Arturo will be two and a half times as old as his son.
a + 5 = 2.5(s+5)
a + 5 = 2.5s + 12.5
a = 2.5s + 12.5 - 5
a = 2.5s + 7.5
Replaces a with 3s and solve


What are their ages?