Min and Olivia had equal amount of money. Each day, Min spent $13 and Olivia spent $23. When Min had $80 left, Olivia had
12 as much money left as Min. How much money did the two girls have at first?
| |
Min |
Olivia |
| Before |
13 u + 80 |
23 u + 40 |
| Change |
- 13 u |
- 23 u |
| After |
$80 |
$40 |
Amount that Olivia had left
=
12 x 80
= $40
The amount that Min and Olivia had at first is the same.
23 u + 40 = 13 u + 80
23 u - 13 u = 80 - 40
10 u = 40
1 u = 40 ÷ 10 = 4
Amount that Min had at first
= 13 u + 80
= 13 x 4 + 80
= 52 + 80
= $132
Total amount that both girls had at first
= 2 x 132
= $264
Answer(s): $264
