Irene had $400 more than Yen. Irene gave
35 of her money to Yen. Yen then gave 25% of her money to Irene. In the end, Yen had $236 more than Irene. How much did Irene have at first?
| |
Irene |
Yen |
Comparing Irene
and Yen at first |
400 more |
|
| Before |
5 u |
+ 400 |
5 u |
|
| Change 1 |
- 3 u |
- 240 |
+ 3 u |
+ 240 |
| After 1 |
2 u |
+ 160 |
8 u |
+ 240 |
| Change 2 |
+ 2 u |
+ 60 |
- 2 u |
- 60 |
| After 2 |
4 u |
+ 220 |
6 u |
+ 180 |
35 x 400= 240
400 - 240 = 160
25% x 8 u
=
25100 x 8 u
= 2 u
25% x 240
=
25100 x 240
= 60
240 - 60 = 180
160 + 60 = 220
If Irene received another $236 in the end, Irene and Yen would have the same amount of money.
6 u + 180 = 4 u + 220 + 236
6 u - 4 u = 220 + 236 - 180
2 u = 276
1 u = 276 ÷ 2 = 138
Amount that Irene had at first
= 5 u + 400
= 5 x 138 + 400
= 690 + 400
= $1090
Answer(s): $1090
