Billy had $142 more than Simon. After Simon gave $131 to Billy, Billy had 5 times as much money as Simon. How much money did Billy have at first?
| |
Billy |
Simon |
Comparing between
Billy and Simon
at first |
$142 more |
|
| Before |
5 u - $131 |
1 u + $131 |
| Change |
+ $131 |
- $131 |
| After |
5 u |
1 u |
Billy had $142 more than Simon at first. If Simon had another $142 at first, both of them would had the same amount of money.
5 u - 131 = 1 u + 131 + 142
5 u - 131 = 1 u + 273
5 u - 1 u = 131 + 273
4 u = 404
1 u = 404 ÷ 4 = 101
Amount that Billy had at first
= 5 u - 131
= 5 x 101 - 131
= 505 - 131
= $374
Answer(s): $374
