Ivory had $465 more than Erika. Ivory gave
23 of her money to Erika. Erika then gave 20% of her money to Ivory. In the end, Erika had $131 more than Ivory. How much did Ivory have at first?
| |
Ivory |
Erika |
Comparing Ivory
and Erika at first |
465 more |
|
| Before |
3 u |
+ 465 |
3 u |
|
| Change 1 |
- 2 u |
- 310 |
+ 2 u |
+ 310 |
| After 1 |
1 u |
+ 155 |
5 u |
+ 310 |
| Change 2 |
+ 1 u |
+ 62 |
- 1 u |
- 62 |
| After 2 |
2 u |
+ 217 |
4 u |
+ 248 |
23 x 465= 310
465 - 310 = 155
20% x 5 u
=
20100 x 5 u
= 1 u
20% x 310
=
20100 x 310
= 62
310 - 62 = 248
155 + 62 = 217
If Ivory received another $131 in the end, Ivory and Erika would have the same amount of money.
4 u + 248 = 2 u + 217 + 131
4 u - 2 u = 217 + 131 - 248
2 u = 100
1 u = 100 ÷ 2 = 50
Amount that Ivory had at first
= 3 u + 465
= 3 x 50 + 465
= 150 + 465
= $615
Answer(s): $615
