Min bought some Chinese books at $9 each. She also bought an equal number of Literature books at a different price. The average price of one Chinese and one Literature book was $7. Min paid $28 more for the Chinese books than the Literature books.
- What was the cost of one Literature book?
- How many Chinese books did Min buy?
|
Chinese |
Literature |
More |
Number |
1 u |
1 u |
|
Value |
$9 |
$5 |
|
Total value |
9 u |
5 u |
$28 |
(a)
Price of one Literature book
= 2 x 7 - 9
= 14 - 9
= $5
Amount that Min paid more for Chinese books than Literature books
= 9 u - 5 u
= 4 u
4 u = 28
1 u = 28 ÷ 4 = 7
Number of Chinese books that Min bought
= 1 u
= 7
Answer(s): (a) $5; (b) 7