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Math Help - Primary 5 math problem sum 1

  1. #1
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    Primary 5 math problem sum 1

    4/5 of cheyenne's present age is 1/3 of Ryan's age in 3 years' time.
    Their total age in 5 years' time is 58.
    What is Ryan's present age?
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  2. #2
    Super Member Matt Westwood's Avatar
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    Quote Originally Posted by mytan1963 View Post
    4/5 of cheyenne's present age is 1/3 of Ryan's age in 3 years' time.
    Their total age in 5 years' time is 58.
    What is Ryan's present age?
    Let C be Cheyenne's present age, and let R be Ryan's present age.

    Then you have:

    \frac {4C} 5 = \frac {R+3} 3
    (C+5) + (R+5) = 58

    Now you just need to solve for R.
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