Billy had $36 more than Diana. After Diana spent
23 of her money, Billy had five times as much money as Diana. How much money did Billy have at first?
| |
Billy |
Diana |
| Before |
5 u |
3 u |
| Change |
|
- 2 u |
| After |
5 u |
1 u |
Amount that Billy had in the end
= 5 x 1 u
= 5 u
If Diana had another $36 at first, the amounts that Billy and Diana each had at first will be the same.
5 u = 3 u + 36
5 u - 3 u = 36
2 u = 36
1 u = 36 ÷ 2 = 18
Amount Billy had at first
= 5 u
= 5 x 18
= $90
Answer(s): $90
