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?

2 answers

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
In​ 2009, a diabetic express company charged ​$37.75 for a vial of type A insulin and ​$
30.49 for a vial of type B insulin. If a total of ​$1684.22 was collected for 50 vials of​ insulin, how many vials of each type were​ sold?