Cole had $3.40 less than Charlie. After Cole gave $3.10 to Charlie, Charlie would have four times as much money as Cole. How much money had Charlie at first?
| |
Charlie |
Cole |
| Before |
4 u - $3.10 |
1 u + $3.10 |
| Change |
+ $3.10 |
- $3.10 |
| After |
4 u |
1 u |
Cole had $3.40 less than Charlie. If another $3.40 was given to Cole, Charlie and Cole would have the same amount at first.
4 u - 3.10 = 1 u + 3.10 + 3.40
4 u - 1 u = 3.10 + 3.40 + 3.10
3 u = 9.60
1 u = 9.60 ÷ 3 = 3.20
Amount that Charlie had at first
= 4 u - 3.10
= 4 x 3.20 + 3.10
= 12.80 + 3.10
= $15.90
Answer(s): $15.90
