Tim had $42 more than Xuan. After Xuan spent
15 of her money, Tim had twice as much money as Xuan. How much money did Tim have at first?
| |
Tim |
Xuan |
| Before |
8 u |
5 u |
| Change |
|
- 1 u |
| After |
8 u |
4 u |
Amount that Tim had in the end
= 2 x 4 u
= 8 u
If Xuan had another $42 at first, the amounts that Tim and Xuan each had at first will be the same.
8 u = 5 u + 42
8 u - 5 u = 42
3 u = 42
1 u = 42 ÷ 3 = 14
Amount Tim had at first
= 8 u
= 8 x 14
= $112
Answer(s): $112
