SOLUTION: q's age is 80% of R's age. five years from now Q's age will be 90% of R's age. how old is each now?

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Question 725440: q's age is 80% of R's age. five years from now Q's age will be 90% of R's age. how old is each now?
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
q = 8r/10
q + 5 = 9(r + 5)/10

Substitute the first equation into the second.

8r/10 + 5 = 9r/10 + 4.5
0.5 = r/10
r = 5 ---> q = 4

Q is 4 and R is 5.