Caden and Luke had $71 and $57 respectively. Each of them bought a blouse and a cardigan at the same price. The cost of the blouse was 4 times as much as the cardigan. In the end, Caden had 3 times as much money as Luke. What was the difference between the cost of the cardigan and the blouse?
|
Caden |
Luke |
Difference |
Before |
$71 |
$57 |
$14 |
Change |
- 5 p |
- 5 p |
|
After |
3 u |
1 u |
2 u |
Since Caden and Luke bought the same items at the same price, the difference in the amounts they had remains unchanged at first and in the end.
3 u - 1 u = 71 - 57
2 u = 14
1 u = 14 ÷ 2 = 7
Cost of 1 blouse = 4 p
Cost of 1 cardigan = 1 p
Total cost of 1 blouse and 1 cardigan
= 4 p + 1 p
= 5 p
5 p = 57 - 7
5 p = 50
1 p = 50 ÷ 5 = 10
Difference in the cost between the blouse and the cardigan
= 4 p - 1 p
= 3 p
= 3 x 10
= $30
Answer(s): $30