Equations Homework

Question

A bookstore sells used books. How many paperback books did the store sell? Paperback books cost $1.00 Harback books sells for $5.00. The store sold 100 books and made $260 from the sale.

Answer 1

x=number of paperbacks sold

y=number of hard covers sold

x+y = 100 or y = 100-x

(x)(1) + (y)(5) = 260

x + (100-x)(5) = 260

x + 500 - 5x = 260

500 - 4x = 260

-4x = -240 or 4x = 240

x = 60

check:

(40*5)+(60*1) = 260

200 + 60 = 260

260 = 260