Question

Britney bought 4 book covers and 5 binders and spent $30.50. Brianna

bought 2 book covers and 3 binders and spent $17.50. How much did a
book cover cost? How much did a binder cost?

Answer 1

A Book cover costs = 8.70

A Binder costs = 8.80

8.70 + 8.80 = $17.5

For Brianna

A Book cover costs = 13.75

A Binder costs = 16.75

13.75 + 16.75 = $30.50

For Britney

Answer 2

2$a book, 4,5$a binder

Explanation:

4 books...... 5 binders..... 30,50$

2 books...... 3 binders.... 17,50$/×2

=>

4 books..... 5 binders..... 30,50$

4 books...... 6 binders...... 35$

///////

6-5 =1binder cost 35 - 30,50 =4,5$

3 ×4,5 =13,5$three binders

17,5 - 13,5 =4$cost 2 books covers

4:2=2$cost a book covers