SOLUTION: A 37 year old father has a 4 year old son. In how many years will the father be exactly 4 times as old as his son.

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Question 487851: A 37 year old father has a 4 year old son. In how many years will the father be exactly 4 times as old as his son.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A 37 year old father has a 4 year old son.
In how many years will the father be exactly 4 times as old as his son.
:
Let y = no. of years until this is true
:
y + 37 = 4(y + 4)
y + 37 = 4y + 16
37 - 16 = 4y - y
21 = 3y
y = 21%2F3
y = 7 years
:
:
You can confirm this: 37 + 7 = 4(7 + 4)