Sarah had $77 less than Kimberly at first. After Kimberly and Sarah spent an equal amount of money, Sarah had
310 as much as Kimberly. How much money did Sarah have left?
| |
Sarah |
Kimberly |
Difference |
| Before |
1 u |
1 u + $77 |
$77 |
| Change |
- 1 |
- 1 |
|
| After |
3 p |
10 p |
7 p |
Difference in the amounts between Kimberly and Sarah
= 10 p - 3 p
= 7 p
Since both Kimberly and Sarah spent an equal amount, the difference in the amounts that Kimberly and Sarah had at first and in the end remains unchanged.
7 p = 77
1 p = 77 ÷ 7 = 11
Amount that Sarah had left
= 3 p
= 3 x 11
= $33
Answer(s): $33
