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John's father is thrice as old as John. 6 years from now, his father will be 24 years older than John. How old is John now?

  • math -

    "I think we can say that the father is 24 years older than John, regardless of how old they are. If J represents John's age now, then 3J represents John's father's age. This is equal to J+24, so we set an equation

    3J = J + 24

    2J = 24

    J = 12, 3J = 36

    John is 12, and his father is 36."

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