Joelle had $15 more than Jane at first. After Joelle and Jane spent an equal amount of money, Jane had
710 as much as Joelle. How much money did Joelle have left?
| |
Joelle |
Jane |
Difference |
| Before |
1 u + $15 |
1 u |
$15 |
| Change |
- 1 |
- 1 |
|
| After |
10 p |
7 p |
3 p |
Difference in the amounts between Joelle and Jane
= 10 p - 7 p
= 3 p
Since both Joelle and Jane spent an equal amount, the difference in the amounts that Joelle and Jane had at first and in the end remains unchanged.
3 p = 15
1 p = 15 ÷ 3 = 5
Amount that Joelle had left
= 10 p
= 10 x 5
= $50
Answer(s): $50
