Emily bought some Japanese books at $17 each. She also bought an equal number of Literature books at a different price. The average price of one Japanese and one Literature book was $12. Emily paid $90 less for the Literature books than the Japanese books.
- What was the cost of one Literature book?
- How many Japanese books did Emily buy?
|
Japanese |
Literature |
Less |
Number |
1 u |
1 u |
|
Value |
$17 |
$7 |
|
Total value |
17 u |
7 u |
$90 |
(a)
Price of one Literature book
= 2 x 12 - 17
= 24 - 17
= $7
Amount that Emily paid less for Literature books than Japanese books
= 17 u - 7 u
= 10 u
10 u = 90
1 u = 90 ÷ 10 = 9
Number of Japanese books that Emily bought
= 1 u
= 9
Answer(s): (a) $7; (b) 9