Eddie G.

asked • 05/24/17

Pose a system of equations to find the number of new books that have been sold. Calculate how many books were sold with a 50% discount.

In an online shop, 800 copies of a textbook have been sold, including new and used ones, and a total of 7110 euros has been obtained. A new books costs 10 euros, while the used ones are sold at a discount of 40% or 50% depending on their condition. It has been proven that for every three new books a used one has been sold.

1 Expert Answer


Dr. Sherif N. answered • 05/24/17

New to Wyzant

Educator, Coach and Mentor

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.


Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.