Abi bought some French books at $20 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. Abi paid $144 more for the French books than the English books.
- What was the cost of one English book?
- How many French books did Abi buy?
|
French |
English |
More |
Number |
1 u |
1 u |
|
Value |
$20 |
$4 |
|
Total value |
20 u |
4 u |
$144 |
(a)
Price of one English book
= 2 x 12 - 20
= 24 - 20
= $4
Amount that Abi paid more for French books than English books
= 20 u - 4 u
= 16 u
16 u = 144
1 u = 144 ÷ 16 = 9
Number of French books that Abi bought
= 1 u
= 9
Answer(s): (a) $4; (b) 9