In 2009 a diabetic express company charged 3995 for a vial


In 2009, a diabetic express company charged $39.95 for a vial of type A insulin and $30.34 for a vial of type B insulin. If a total of $1747.64 was collected for 50 vials of insulin, how many vials of each type were sold? 

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Algebra: In 2009 a diabetic express company charged 3995 for a vial
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