Daniel had $51.20 more than David. After David had spent
23 of his money, Daniel had $67.60 more than David. How much money did Daniel have at first?
| |
Daniel |
David |
More |
| Before |
3 u + $51.20 |
3 u |
$51.20 |
| Change |
|
- 2 u |
|
| After |
3 u + $51.20 |
1 u |
2 u + $51.20 |
Daniel had $67.60 more than David in the end.
3 u + 51.20 - 1 u = 67.60
2 u + 51.20 = 67.60
2 u = 67.60 - 51.20
2 u = 16.40
1 u = 16.40 ÷ 2 = 8.20
Amount that Daniel had at first
= 3 u + 51.20
= 3 x 8.20 + 51.20
= 24.60 + 51.20
= $75.80
Answer(s): $75.80
