Problema Solution
A diabetic express company charged $38.85 for a vial of type A insulin and $30.34 for a vial of type B insulin. If a total $1392.31 was collected for 40 vials of insulin, how many vial of each type were sold
Answer provided by our tutors
let
x = the number of vials of type A insulin
y = the number of vials of type B insulin
total of 40 vials of insulin was sold
x + y = 40
total of $1392.31 was collected for 40 vials of insulin
38.85x + 30.34y = 1392.31
by solving the system of equations
x + y = 40
38.85x + 30.34y = 1392.31
we find
x = 21 vials of type A insulin
y = 19 vials of type B insulin
click here to see the step by step solution of the system of equations
there were 21 vials of type A insulin and 19 vials of type B insulin sold.