Vincent had $42 more than Sabrina. After Sabrina spent
15 of her money, Vincent had thrice as much money as Sabrina. How much money did Vincent have at first?
| |
Vincent |
Sabrina |
| Before |
12 u |
5 u |
| Change |
|
- 1 u |
| After |
12 u |
4 u |
Amount that Vincent had in the end
= 3 x 4 u
= 12 u
If Sabrina had another $42 at first, the amounts that Vincent and Sabrina each had at first will be the same.
12 u = 5 u + 42
12 u - 5 u = 42
7 u = 42
1 u = 42 ÷ 7 = 6
Amount Vincent had at first
= 12 u
= 12 x 6
= $72
Answer(s): $72
