Problema Solution
Howard Hughes Bookstore sold 7 tablets and 2 pens at a cost of $6.40. They also sold 2 tablets and 19 pens for $5.40. What was the cost of each of the tablets and each of the pens?
The answer is Tablets .880 cents and Pens .20 cents, but I do not know how they came up with that answer.
Answer provided by our tutors
let
t = the cost of a tablet
p = the cost of a pen
Howard Hughes Bookstore sold 7 tablets and 2 pens at a cost of $6.40
7t + 2p = 6.40
They also sold 2 tablets and 19 pens for $5.40
2t + 19p = 5.40
by solving the system of equations
7t + 2p = 6.40
2t + 19p = 5.40
we find
t = $0.859
p = $0.194
click here to see the step by step solution of the system of equations
Tablet is $0.859 or 85.9 cents.
Pens are $0.194 or 19.4 cents.