Barbara had $783 and Vincent had $639 less than Barbara at first. After Barbara gave some money to Vincent, Vincent had 2 times as much as Barbara. How much did Barbara give to Vincent?
| |
Barbara |
Vincent |
Total |
| Before |
$783 |
$144 |
$927 |
| Change |
- ? |
+ ? |
|
| After |
1 u |
2 u |
$927 |
Amount that Barbara had = $783
Amount that Vincent had
= 783 - 639
= $144
Total amount that Barbara and Vincent had
= 783 + 144
= $927
Amount that Barbara had in the end = 1 u
Amount that Vincent had in the end = 2 u
Total amount that Barbara and Vincent had
= 1 u + 2 u
= 3 u
As Barbara gave some money to Vincent, the total amount that Vincent and Barbara had at first and in the end remains unchanged.
3 u = 927
1 u = 927 ÷ 3 = 309
Amount that Barbara gave Vincent
= 783 - 309
= $474
Answer(s): $474
