Oscar had $6.50 less than Jack. After Oscar gave $1.10 to Jack, Jack would have four times as much money as Oscar. How much money had Jack at first?
| |
Jack |
Oscar |
| Before |
4 u - $1.10 |
1 u + $1.10 |
| Change |
+ $1.10 |
- $1.10 |
| After |
4 u |
1 u |
Oscar had $6.50 less than Jack. If another $6.50 was given to Oscar, Jack and Oscar would have the same amount at first.
4 u - 1.10 = 1 u + 1.10 + 6.50
4 u - 1 u = 1.10 + 6.50 + 1.10
3 u = 8.70
1 u = 8.70 ÷ 3 = 2.90
Amount that Jack had at first
= 4 u - 1.10
= 4 x 2.90 + 1.10
= 11.60 + 1.10
= $12.70
Answer(s): $12.70
