Question 946806: The age of the father was 4 time and 2 times of his son in 1990 and 2008 respectively. Find the birth year of the son. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! The age of the father was 4 time and 2 times of his son in 1990 and 2008 respectively. Find the birth year of the son.
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Equations:
f = 4s
f+18 = 2(s+18)
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Substitute for "f" and solve for "s"::
4s+18 = 2s+36
2s = 18
s = 9 (son's age now)
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f = 4s
f = 36 (father's age now)
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Cheers,
Stan H.
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