Tina had $752 and John had $637 less than Tina at first. After Tina gave some money to John, John had 2 times as much as Tina. How much did Tina give to John?
| |
Tina |
John |
Total |
| Before |
$752 |
$115 |
$867 |
| Change |
- ? |
+ ? |
|
| After |
1 u |
2 u |
$867 |
Amount that Tina had = $752
Amount that John had
= 752 - 637
= $115
Total amount that Tina and John had
= 752 + 115
= $867
Amount that Tina had in the end = 1 u
Amount that John had in the end = 2 u
Total amount that Tina and John had
= 1 u + 2 u
= 3 u
As Tina gave some money to John, the total amount that John and Tina had at first and in the end remains unchanged.
3 u = 867
1 u = 867 ÷ 3 = 289
Amount that Tina gave John
= 752 - 289
= $463
Answer(s): $463
