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math

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If Leah is 6 years older than Sue, and John is 5 years older than Leah, and the total of their ages is 41. Then how old is Sue? How do you know what and, is, and older mean in mathematical terms?

  • math - ,

    Since Leah is mentioned twice, let's define her age as x yrs.
    then Sue is x-6
    and John is x+5

    so x + x-6 + x+5 = 41
    3x = 42
    x = 14

    Leah is 14
    Sue is 8
    John is 19

  • math - ,

    s + s + 6 + s + 11 = 41

    3s + 17 = 41

    3s = 41 - 17
    3s = 24
    s = 8

    Sue is 8
    Leah is 14
    John is 19

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