SOLUTION: Mr. rashid is 4 times as old as his son.Four years ago the sum of their age was 37.find the son's present age

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Question 1009452: Mr. rashid is 4 times as old as his son.Four years ago the sum of their age was 37.find the son's present age
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Call Mr. Rashid's and his son's age NOW, r and s. Then we have
r = 4s and
r-4 + s-4 = 37
Now substitute
4s - 4 + s - 4 = 37
5s - 8 = 37
5s = 45
s = 9
r = 36