SOLUTION: Mr Jones is now 28 years older than Robbie. Nine years ago, he was five times as old as Robbie was then. How old is each?

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Question 1014300: Mr Jones is now 28 years older than Robbie. Nine years ago, he was five times as old as Robbie was then. How old is each?
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
Mr. Jones = J
Robbie = R

J = R + 28
J - 9 = 5(R - 9)

Plug in the first equation into the second.

R + 19 = 5R - 45
64 = 4R

Robbie's age = R = 16
Mr. Jones' age = J = 44