Ian had $39 more than Vaidev. Every day, Ian and Vaidev would spend an equal amount of money. After 3 days, Ian was left with 2 times as much money as Vaidev. Given that Ian had $99 at first, how much did each of them spend every day?
| |
Vaidev |
Ian |
Difference |
| Before |
|
$99 |
$39 |
| Change |
- ? |
- ? |
|
| After |
1 u |
2 u |
1 u |
Since both Ian and Vaidev spent an equal amount of money every day, the difference in their amounts remains the same.
Difference in their amounts
= 2 u - 1 u
= 1 u
1 u = 39
1 u = 39 ÷ 1 = 39
Amount that Ian had in the end
= 2 u
= 2 x 39
= $78
Amount that Ian had spent
= 99 - 78
= $21
Amount that each of them spent every day
= 21 ÷ 3
= $7
Answer(s): $7
