Emma had $9 more than Marion at first. After Emma and Marion spent an equal amount of money, Marion had
710 as much as Emma. How much money did Emma have left?
| |
Emma |
Marion |
Difference |
| Before |
1 u + $9 |
1 u |
$9 |
| Change |
- 1 |
- 1 |
|
| After |
10 p |
7 p |
3 p |
Difference in the amounts between Emma and Marion
= 10 p - 7 p
= 3 p
Since both Emma and Marion spent an equal amount, the difference in the amounts that Emma and Marion had at first and in the end remains unchanged.
3 p = 9
1 p = 9 ÷ 3 = 3
Amount that Emma had left
= 10 p
= 10 x 3
= $30
Answer(s): $30
