Jack had $130 more than Billy. After Billy gave $132 to Jack, Jack had 3 times as much money as Billy. How much money did Jack have at first?
| |
Jack |
Billy |
Comparing between
Jack and Billy
at first |
$130 more |
|
| Before |
3 u - $132 |
1 u + $132 |
| Change |
+ $132 |
- $132 |
| After |
3 u |
1 u |
Jack had $130 more than Billy at first. If Billy had another $130 at first, both of them would had the same amount of money.
3 u - 132 = 1 u + 132 + 130
3 u - 132 = 1 u + 262
3 u - 1 u = 132 + 262
2 u = 394
1 u = 394 ÷ 2 = 197
Amount that Jack had at first
= 3 u - 132
= 3 x 197 - 132
= 591 - 132
= $459
Answer(s): $459
