Pat and Carlos both belong to the same book club. The book club has two prices on its books: a flat fee for regular selections and another flat fee for specially discounted items. Pat orders two regular selections and four specially discounted one for a total of $119.80. Carlos orders three regular selections and five specially discounted ones for a total of $160.75. What are the prices of a regular selection and for a specially discounted selection?
R = price of regular
D = Price of Discounted
2R + 4D = 119.80 ...
This shows how to set up a system of equations to solve a word problem.