Risa had $27 less than Shiyun at first. After Shiyun and Risa spent an equal amount of money, Risa had
47 as much as Shiyun. How much money did Risa have left?
| |
Risa |
Shiyun |
Difference |
| Before |
1 u |
1 u + $27 |
$27 |
| Change |
- 1 |
- 1 |
|
| After |
4 p |
7 p |
3 p |
Difference in the amounts between Shiyun and Risa
= 7 p - 4 p
= 3 p
Since both Shiyun and Risa spent an equal amount, the difference in the amounts that Shiyun and Risa had at first and in the end remains unchanged.
3 p = 27
1 p = 27 ÷ 3 = 9
Amount that Risa had left
= 4 p
= 4 x 9
= $36
Answer(s): $36
