Shiyun bought some French books at $17 each. She also bought an equal number of English books at a different price. The average price of one French and one English book was $12. Shiyun paid $40 less for the English books than the French books.
- What was the cost of one English book?
- How many French books did Shiyun buy?
|
French |
English |
Less |
Number |
1 u |
1 u |
|
Value |
$17 |
$7 |
|
Total value |
17 u |
7 u |
$40 |
(a)
Price of one English book
= 2 x 12 - 17
= 24 - 17
= $7
Amount that Shiyun paid less for English books than French books
= 17 u - 7 u
= 10 u
10 u = 40
1 u = 40 ÷ 10 = 4
Number of French books that Shiyun bought
= 1 u
= 4
Answer(s): (a) $7; (b) 4