Yen had $30 more than Olivia at first. After Yen and Olivia spent an equal amount of money, Olivia had
710 as much as Yen. How much money did Yen have left?
| |
Yen |
Olivia |
Difference |
| Before |
1 u + $30 |
1 u |
$30 |
| Change |
- 1 |
- 1 |
|
| After |
10 p |
7 p |
3 p |
Difference in the amounts between Yen and Olivia
= 10 p - 7 p
= 3 p
Since both Yen and Olivia spent an equal amount, the difference in the amounts that Yen and Olivia had at first and in the end remains unchanged.
3 p = 30
1 p = 30 ÷ 3 = 10
Amount that Yen had left
= 10 p
= 10 x 10
= $100
Answer(s): $100
