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HELP non linear equations

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A company mixes peanuts, cashews, and almonds to obtain 22 oz package worth 6.91 dollars. If peanuts, cashews, and almonds cost 18, 45, and 50 cents per oz respectively, and the amount of cashews is equal to the amount of almonds, how much of each is in the package?

  • HELP non linear equations -

    p+c+a = 22
    a=c, so
    p = 22-2a

    18p+45c+50a = 691
    18(22-2a)+45a+50a = 691
    a = 5, so

    5 oz almonds
    5 oz cashews
    12 oz peanuts

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