Min had $225 less than Shiyun. Shiyun gave
23 of her money to Min. Min then gave 20% of her money to Shiyun. In the end, Min had $235 more than Shiyun. How much did Min have at first?
|
Shiyun |
Min |
Comparing Shiyun and Min at first |
225 more |
|
Before |
3 u |
+ 225 |
3 u |
|
Change 1 |
- 2 u |
- 150 |
+ 2 u |
+ 150 |
After 1 |
1 u |
+ 75 |
5 u |
+ 150 |
Change 2 |
+ 1 u |
+ 30 |
- 1 u |
- 30 |
After 2 |
2 u |
+ 105 |
4 u |
+ 120 |
23 x 225= 150
225 - 150 = 75
20% x 5 u
=
20100 x 5 u
= 1 u
20% x 150
=
20100 x 150
= 30
150 - 30 = 120
75 + 30 = 105
If Shiyun received another $235 in the end, Shiyun and Min would have the same amount of money.
4 u + 120 = 2 u + 105 + 235
4 u - 2 u = 105 + 235 - 120
2 u = 220
1 u = 220 ÷ 2 = 110
Amount that Min had at first
= 3 u
= 3 x 110
= $330
Answer(s): $330