Risa had $24 more than Xuan at first. After Risa and Xuan spent an equal amount of money, Xuan had
57 as much as Risa. How much money did Risa have left?
| |
Risa |
Xuan |
Difference |
| Before |
1 u + $24 |
1 u |
$24 |
| Change |
- 1 |
- 1 |
|
| After |
7 p |
5 p |
2 p |
Difference in the amounts between Risa and Xuan
= 7 p - 5 p
= 2 p
Since both Risa and Xuan spent an equal amount, the difference in the amounts that Risa and Xuan had at first and in the end remains unchanged.
2 p = 24
1 p = 24 ÷ 2 = 12
Amount that Risa had left
= 7 p
= 7 x 12
= $84
Answer(s): $84
