Jade bought some Chemistry books at $10 each. She also bought an equal number of Literature books at a different price. The average price of one Chemistry and one Literature book was $7. Jade paid $36 more for the Chemistry books than the Literature books.
- What was the cost of one Literature book?
- How many Chemistry books did Jade buy?
|
Chemistry |
Literature |
More |
Number |
1 u |
1 u |
|
Value |
$10 |
$4 |
|
Total value |
10 u |
4 u |
$36 |
(a)
Price of one Literature book
= 2 x 7 - 10
= 14 - 10
= $4
Amount that Jade paid more for Chemistry books than Literature books
= 10 u - 4 u
= 6 u
6 u = 36
1 u = 36 ÷ 6 = 6
Number of Chemistry books that Jade bought
= 1 u
= 6
Answer(s): (a) $4; (b) 6