Risa had $15 more than Sabrina at first. After Risa and Sabrina spent an equal amount of money, Sabrina had
58 as much as Risa. How much money did Risa have left?
| |
Risa |
Sabrina |
Difference |
| Before |
1 u + $15 |
1 u |
$15 |
| Change |
- 1 |
- 1 |
|
| After |
8 p |
5 p |
3 p |
Difference in the amounts between Risa and Sabrina
= 8 p - 5 p
= 3 p
Since both Risa and Sabrina spent an equal amount, the difference in the amounts that Risa and Sabrina had at first and in the end remains unchanged.
3 p = 15
1 p = 15 ÷ 3 = 5
Amount that Risa had left
= 8 p
= 8 x 5
= $40
Answer(s): $40
