Cole had $3.70 less than David. After Cole gave $1.60 to David, David would have four times as much money as Cole. How much money had David at first?
| |
David |
Cole |
| Before |
4 u - $1.60 |
1 u + $1.60 |
| Change |
+ $1.60 |
- $1.60 |
| After |
4 u |
1 u |
Cole had $3.70 less than David. If another $3.70 was given to Cole, David and Cole would have the same amount at first.
4 u - 1.60 = 1 u + 1.60 + 3.70
4 u - 1 u = 1.60 + 3.70 + 1.60
3 u = 6.90
1 u = 6.90 ÷ 3 = 2.30
Amount that David had at first
= 4 u - 1.60
= 4 x 2.30 + 1.60
= 9.20 + 1.60
= $10.80
Answer(s): $10.80
