David had 3 times as much money as Jack. After David had spent one-third of his money, he had $24 more than Jack. How much money did David have at first?
| |
David |
Jack |
| Before |
3 u |
1 u |
| Change |
- 1 u |
|
| After |
2 u |
1 u |
Amount that David had after he spent one-third of his money
= 3 u ÷ 3
= 1 u
Amount that David had more than Jack in the end
= 2 u - 1 u
= 1 u
1 u = 24
Amount that David had at first
= 3 u
= 3 x 24
= $72
Answer(s): $72
