algebra

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Together, Jared's age and his grandfather's age total 100. But Jared's grandfather is 70 years older than him. How old is Jared's grandfather?

  • algebra -

    Jared --- x
    grandpa -- x+70

    x + x+70 = 100
    2x = 30
    x = 15

    so grandpa is 15+70 = 85

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