One eight-ounce glass of apple juice and one eight-ounce glass of orange juice contain a total of 180 milligrams of vitamin C. Four eight-ounce glasses of apple juice and three eight-ounce glasses of orange juice contain a total of 637.4 milligrams of vitamin C. How much vitamin C is in an eight-ounce glass of each type of juice?
apple juice ___ mg
orange juice __ mg

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  1. just turn all those words into algebra:

    If there are
    x mg of vitamin C in a glass of apple juice
    y mg in a glass of orange juice

    then consider the amount of vitamin C as described above:

    x+y = 180
    4x+3y = 637.4

    now just find x and y

    It could have been worse; the glasses might have been of different sizes!

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