Ivory had $435 more than Risa. Ivory gave
23 of her money to Risa. Risa then gave 20% of her money to Ivory. In the end, Risa had $205 more than Ivory. How much did Ivory have at first?
| |
Ivory |
Risa |
Comparing Ivory
and Risa at first |
435 more |
|
| Before |
3 u |
+ 435 |
3 u |
|
| Change 1 |
- 2 u |
- 290 |
+ 2 u |
+ 290 |
| After 1 |
1 u |
+ 145 |
5 u |
+ 290 |
| Change 2 |
+ 1 u |
+ 58 |
- 1 u |
- 58 |
| After 2 |
2 u |
+ 203 |
4 u |
+ 232 |
23 x 435= 290
435 - 290 = 145
20% x 5 u
=
20100 x 5 u
= 1 u
20% x 290
=
20100 x 290
= 58
290 - 58 = 232
145 + 58 = 203
If Ivory received another $205 in the end, Ivory and Risa would have the same amount of money.
4 u + 232 = 2 u + 203 + 205
4 u - 2 u = 203 + 205 - 232
2 u = 176
1 u = 176 ÷ 2 = 88
Amount that Ivory had at first
= 3 u + 435
= 3 x 88 + 435
= 264 + 435
= $699
Answer(s): $699
