Joelle and Barbara had equal amount of money. Each day, Joelle spent $6 and Barbara spent $8. When Joelle had $108 left, Barbara had
13 as much money left as Joelle. How much money did the two girls have at first?
| |
Joelle |
Barbara |
| Before |
6 u + 108 |
8 u + 36 |
| Change |
- 6 u |
- 8 u |
| After |
$108 |
$36 |
Amount that Barbara had left
=
13 x 108
= $36
The amount that Joelle and Barbara had at first is the same.
8 u + 36 = 6 u + 108
8 u - 6 u = 108 - 36
2 u = 72
1 u = 72 ÷ 2 = 36
Amount that Joelle had at first
= 6 u + 108
= 6 x 36 + 108
= 216 + 108
= $324
Total amount that both girls had at first
= 2 x 324
= $648
Answer(s): $648
