Perry and Ryan had $147 and $129 respectively. Each of them bought a sweater and a jacket at the same price. The cost of the sweater was 4 times as much as the jacket. In the end, Perry had 3 times as much money as Ryan. What was the difference between the cost of the jacket and the sweater?
|
Perry |
Ryan |
Difference |
Before |
$147 |
$129 |
$18 |
Change |
- 5 p |
- 5 p |
|
After |
3 u |
1 u |
2 u |
Since Perry and Ryan 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 = 147 - 129
2 u = 18
1 u = 18 ÷ 2 = 9
Cost of 1 sweater = 4 p
Cost of 1 jacket = 1 p
Total cost of 1 sweater and 1 jacket
= 4 p + 1 p
= 5 p
5 p = 129 - 9
5 p = 120
1 p = 120 ÷ 5 = 24
Difference in the cost between the sweater and the jacket
= 4 p - 1 p
= 3 p
= 3 x 24
= $72
Answer(s): $72