Irene had $21 more than Julie at first. After Irene and Julie spent an equal amount of money, Julie had
47 as much as Irene. How much money did Irene have left?
| |
Irene |
Julie |
Difference |
| Before |
1 u + $21 |
1 u |
$21 |
| Change |
- 1 |
- 1 |
|
| After |
7 p |
4 p |
3 p |
Difference in the amounts between Irene and Julie
= 7 p - 4 p
= 3 p
Since both Irene and Julie spent an equal amount, the difference in the amounts that Irene and Julie had at first and in the end remains unchanged.
3 p = 21
1 p = 21 ÷ 3 = 7
Amount that Irene had left
= 7 p
= 7 x 7
= $49
Answer(s): $49
