Michael had $57 more than Xandra. After Xandra spent
13 of her money, Michael had thrice as much money as Xandra. How much money did Michael have at first?
| |
Michael |
Xandra |
| Before |
6 u |
3 u |
| Change |
|
- 1 u |
| After |
6 u |
2 u |
Amount that Michael had in the end
= 3 x 2 u
= 6 u
If Xandra had another $57 at first, the amounts that Michael and Xandra each had at first will be the same.
6 u = 3 u + 57
6 u - 3 u = 57
3 u = 57
1 u = 57 ÷ 3 = 19
Amount Michael had at first
= 6 u
= 6 x 19
= $114
Answer(s): $114
