Jack had $48 more than Xuan. After Xuan spent
15 of her money, Jack had twice as much money as Xuan. How much money did Jack have at first?
| |
Jack |
Xuan |
| Before |
8 u |
5 u |
| Change |
|
- 1 u |
| After |
8 u |
4 u |
Amount that Jack had in the end
= 2 x 4 u
= 8 u
If Xuan had another $48 at first, the amounts that Jack and Xuan each had at first will be the same.
8 u = 5 u + 48
8 u - 5 u = 48
3 u = 48
1 u = 48 ÷ 3 = 16
Amount Jack had at first
= 8 u
= 8 x 16
= $128
Answer(s): $128
