Billy had $130 more than Peter. After Peter gave $123 to Billy, Billy had 5 times as much money as Peter. How much money did Billy have at first?
| |
Billy |
Peter |
Comparing between
Billy and Peter
at first |
$130 more |
|
| Before |
5 u - $123 |
1 u + $123 |
| Change |
+ $123 |
- $123 |
| After |
5 u |
1 u |
Billy had $130 more than Peter at first. If Peter had another $130 at first, both of them would had the same amount of money.
5 u - 123 = 1 u + 123 + 130
5 u - 123 = 1 u + 253
5 u - 1 u = 123 + 253
4 u = 376
1 u = 376 ÷ 4 = 94
Amount that Billy had at first
= 5 u - 123
= 5 x 94 - 123
= 470 - 123
= $347
Answer(s): $347
