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Math Help - Help!!

  1. #1
    Newbie
    Joined
    Apr 2006
    Posts
    8

    Help!!

    A father is nine times the age of his son. In 5 years, he will be four times the age of his son. How old are they now?

    Omg, after finishing the qudratics chapter, ive forgotten some algebra. Please help me out.

    Thanks in advance
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  2. #2
    Junior Member
    Joined
    May 2005
    Posts
    60
    Let the son's age = X
    Then Father's Age = 9X

    In 5 years
    Son's age = X+5
    Father's age = 9X+5

    But it is given that the father will be 4 times as old
    i.e. 9X+5 = 4(X+5)
    9X+5 = 4X+20
    5X = 15
    X = 3

    So the son's age is 3 years
    And the father's age = 9x3 = 27years

    p.s. On a completely different note, the father had his son when he was 24.
    I am 24!!!!
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