Kathy bought some English books at $12 each. She also bought an equal number of Literature books at a different price. The average price of one English and one Literature book was $9. Kathy paid $30 less for the Literature books than the English books.
- What was the cost of one Literature book?
- How many English books did Kathy buy?
|
English |
Literature |
Less |
Number |
1 u |
1 u |
|
Value |
$12 |
$6 |
|
Total value |
12 u |
6 u |
$30 |
(a)
Price of one Literature book
= 2 x 9 - 12
= 18 - 12
= $6
Amount that Kathy paid less for Literature books than English books
= 12 u - 6 u
= 6 u
6 u = 30
1 u = 30 ÷ 6 = 5
Number of English books that Kathy bought
= 1 u
= 5
Answer(s): (a) $6; (b) 5