George had $4.80 less than Tom. After George gave $1.30 to Tom, Tom would have thrice as much money as George. How much money had Tom at first?
| |
Tom |
George |
| Before |
3 u - $1.30 |
1 u + $1.30 |
| Change |
+ $1.30 |
- $1.30 |
| After |
3 u |
1 u |
George had $4.80 less than Tom. If another $4.80 was given to George, Tom and George would have the same amount at first.
3 u - 1.30 = 1 u + 1.30 + 4.80
3 u - 1 u = 1.30 + 4.80 + 1.30
2 u = 7.40
1 u = 7.40 ÷ 2 = 3.70
Amount that Tom had at first
= 3 u - 1.30
= 3 x 3.70 + 1.30
= 11.10 + 1.30
= $12.40
Answer(s): $12.40
