Joelle and Barbara had equal amount of money. Each day, Joelle spent $10 and Barbara spent $18. When Joelle had $112 left, Barbara had
37 as much money left as Joelle. How much money did the two girls have at first?
| |
Joelle |
Barbara |
| Before |
10 u + 112 |
18 u + 48 |
| Change |
- 10 u |
- 18 u |
| After |
$112 |
$48 |
Amount that Barbara had left
=
37 x 112
= $48
The amount that Joelle and Barbara had at first is the same.
18 u + 48 = 10 u + 112
18 u - 10 u = 112 - 48
8 u = 64
1 u = 64 ÷ 8 = 8
Amount that Joelle had at first
= 10 u + 112
= 10 x 8 + 112
= 80 + 112
= $192
Total amount that both girls had at first
= 2 x 192
= $384
Answer(s): $384
