Roshel and Erika had equal amount of money. Each day, Roshel spent $15 and Erika spent $25. When Roshel had $120 left, Erika had
14 as much money left as Roshel. How much money did the two girls have at first?
| |
Roshel |
Erika |
| Before |
15 u + 120 |
25 u + 30 |
| Change |
- 15 u |
- 25 u |
| After |
$120 |
$30 |
Amount that Erika had left
=
14 x 120
= $30
The amount that Roshel and Erika had at first is the same.
25 u + 30 = 15 u + 120
25 u - 15 u = 120 - 30
10 u = 90
1 u = 90 ÷ 10 = 9
Amount that Roshel had at first
= 15 u + 120
= 15 x 9 + 120
= 135 + 120
= $255
Total amount that both girls had at first
= 2 x 255
= $510
Answer(s): $510
