Yen had $20 more than Xuan at first. After Yen and Xuan spent an equal amount of money, Xuan had
57 as much as Yen. How much money did Yen have left?
| |
Yen |
Xuan |
Difference |
| Before |
1 u + $20 |
1 u |
$20 |
| Change |
- 1 |
- 1 |
|
| After |
7 p |
5 p |
2 p |
Difference in the amounts between Yen and Xuan
= 7 p - 5 p
= 2 p
Since both Yen and Xuan spent an equal amount, the difference in the amounts that Yen and Xuan had at first and in the end remains unchanged.
2 p = 20
1 p = 20 ÷ 2 = 10
Amount that Yen had left
= 7 p
= 7 x 10
= $70
Answer(s): $70
