SOLUTION: Romeo is one third as old as his father. Five years ago his father was four times as old as Romeo. How many years old is romeo?

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Question 301651: Romeo is one third as old as his father. Five years ago his father was four times as old as Romeo. How many years old is romeo?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Romeo is one third as old as his father.
r = 1%2F3f
or
f = 3r
:
Five years ago his father was four times as old as Romeo.
f - 5 = 4(r-5)
f - 5 = 4r - 20
f = 4r - 20 + 5
f = 4r - 15
replace f with 3r
3r = 4r - 15
3r - 4r = -15
-r = -15
r = 15 yrs is R's age
then
3(15) = 45 yrs is Dad's age
:
:
Check solution in the statement:
Five years ago his father was four times as old as Romeo.
45 - 5 = 4(15 - 4)
40 = 4(10)