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Sue is two years older than Chris. Jim is 4 years older than Sue. Their ages total 68. How old is Sue?

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  1. c = Chris's age

    c + c + 2 + c + 6 = 68

    3c + 8 = 68

    3c = 60

    c = 20

  2. Sue is 22.
    S = Sue's age
    s - 2 = C (Chris' age)
    s + 4 = J (Jim's age)
    s - 2 + s + 4 + s = 68 (I got 3s because I multiplied the 3 s')
    3s + 2 = 68 Subtract 2 on both sides
    3s = 66 Divide 3 on both sides
    s = 22

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