Xandra and Pamela had equal amount of money. Each day, Xandra spent $4 and Pamela spent $7. When Xandra had $108 left, Pamela had
13 as much money left as Xandra. How much money did the two girls have at first?
| |
Xandra |
Pamela |
| Before |
4 u + 108 |
7 u + 36 |
| Change |
- 4 u |
- 7 u |
| After |
$108 |
$36 |
Amount that Pamela had left
=
13 x 108
= $36
The amount that Xandra and Pamela had at first is the same.
7 u + 36 = 4 u + 108
7 u - 4 u = 108 - 36
3 u = 72
1 u = 72 ÷ 3 = 24
Amount that Xandra had at first
= 4 u + 108
= 4 x 24 + 108
= 96 + 108
= $204
Total amount that both girls had at first
= 2 x 204
= $408
Answer(s): $408
