SOLUTION: The sum of ages of father and a son is 45 years.5 years ago the product of their ages was 4 times the fathers age at that time.Find the present ages of father and son?
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Question 430160: The sum of ages of father and a son is 45 years.5 years ago the product of their ages was 4 times the fathers age at that time.Find the present ages of father and son?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The sum of ages of father and a son is 45 years.5 years ago the product of their ages was 4 times the fathers age at that time.Find the present ages of father and son?
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Equations:
f + s = 45
(f-5)(s-5)=4(f-5)
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Substitute for "f" and solve for "s":
f = 45-s
(45-s-5)(s-5) = 4(45-s-5)
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Divide both sides by 45-s-5 to get:
s-5 = 4
s = 9 (son's age now)
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Solve for "f":
f+9 = 45
f = 36 (father's age now)
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Cheers,
Stan H.
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