algebra

In 2009, a diabetic express company charged $38.85 for a vial of type A insulin and $30.49 for a vial of type B insulin. If a total of $2004.96 was collected for
60 vials of insulin, how many vials of each type were sold?

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  1. Let Type A = x
    Let Type B = (60 - x)
    Therefore Type A Type B = Totals
    $38.85x $30.49(60 - x) = 2004.96
    $38.85x $1829.4 - $30.49x = 2004.96
    $38.85x - $30.49x =$ 2004.96 - $1829.4
    $8.36x/8.36 = $175.56/8.36
    X = 21
    Type A = 21
    Type B = (60 - x) = 60 - 21 = 39

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