SOLUTION: A man is 3 times as old as his son. In 10 years he will be twice as old as his son will be. How old are they now?

Question 956185: A man is 3 times as old as his son. In 10 years he will be twice as old as his son will be. How old are they now?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A man is 3 times as old as his son. In 10 years he will be twice as old as his son will be. How old are they now?
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Equations:
f = 3s
f+10 = 2(s+10)
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Substitute for "f" and solve for "s"::
3s+10 = 2s+20
s = 10 yrs (son's age now)
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f = 3s = 30 yrs (father's age now)
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Cheers
Stan H.
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