Jean and Min had equal amount of money. Each day, Jean spent $10 and Min spent $16. When Jean had $91 left, Min had
17 as much money left as Jean. How much money did the two girls have at first?
| |
Jean |
Min |
| Before |
10 u + 91 |
16 u + 13 |
| Change |
- 10 u |
- 16 u |
| After |
$91 |
$13 |
Amount that Min had left
=
17 x 91
= $13
The amount that Jean and Min had at first is the same.
16 u + 13 = 10 u + 91
16 u - 10 u = 91 - 13
6 u = 78
1 u = 78 ÷ 6 = 13
Amount that Jean had at first
= 10 u + 91
= 10 x 13 + 91
= 130 + 91
= $221
Total amount that both girls had at first
= 2 x 221
= $442
Answer(s): $442
