Bobby had $148 more than Elijah. After Elijah gave $129 to Bobby, Bobby had 3 times as much money as Elijah. How much money did Bobby have at first?
| |
Bobby |
Elijah |
Comparing between
Bobby and Elijah
at first |
$148 more |
|
| Before |
3 u - $129 |
1 u + $129 |
| Change |
+ $129 |
- $129 |
| After |
3 u |
1 u |
Bobby had $148 more than Elijah at first. If Elijah had another $148 at first, both of them would had the same amount of money.
3 u - 129 = 1 u + 129 + 148
3 u - 129 = 1 u + 277
3 u - 1 u = 129 + 277
2 u = 406
1 u = 406 ÷ 2 = 203
Amount that Bobby had at first
= 3 u - 129
= 3 x 203 - 129
= 609 - 129
= $480
Answer(s): $480
