George had $48 more than Sarah. After Sarah spent
27 of her money, George had thrice as much money as Sarah. How much money did George have at first?
| |
George |
Sarah |
| Before |
15 u |
7 u |
| Change |
|
- 2 u |
| After |
15 u |
5 u |
Amount that George had in the end
= 3 x 5 u
= 15 u
If Sarah had another $48 at first, the amounts that George and Sarah each had at first will be the same.
15 u = 7 u + 48
15 u - 7 u = 48
8 u = 48
1 u = 48 ÷ 8 = 6
Amount George had at first
= 15 u
= 15 x 6
= $90
Answer(s): $90
