Xavier had $131 more than Riordan. After Riordan gave $137 to Xavier, Xavier had 4 times as much money as Riordan. How much money did Xavier have at first?
| |
Xavier |
Riordan |
Comparing between
Xavier and Riordan
at first |
$131 more |
|
| Before |
4 u - $137 |
1 u + $137 |
| Change |
+ $137 |
- $137 |
| After |
4 u |
1 u |
Xavier had $131 more than Riordan at first. If Riordan had another $131 at first, both of them would had the same amount of money.
4 u - 137 = 1 u + 137 + 131
4 u - 137 = 1 u + 268
4 u - 1 u = 137 + 268
3 u = 405
1 u = 405 ÷ 3 = 135
Amount that Xavier had at first
= 4 u - 137
= 4 x 135 - 137
= 540 - 137
= $403
Answer(s): $403
