Vincent had $1.80 less than Tom. After Vincent gave $3.30 to Tom, Tom would have four times as much money as Vincent. How much money had Tom at first?
| |
Tom |
Vincent |
| Before |
4 u - $3.30 |
1 u + $3.30 |
| Change |
+ $3.30 |
- $3.30 |
| After |
4 u |
1 u |
Vincent had $1.80 less than Tom. If another $1.80 was given to Vincent, Tom and Vincent would have the same amount at first.
4 u - 3.30 = 1 u + 3.30 + 1.80
4 u - 1 u = 3.30 + 1.80 + 3.30
3 u = 8.40
1 u = 8.40 ÷ 3 = 2.80
Amount that Tom had at first
= 4 u - 3.30
= 4 x 2.80 + 3.30
= 11.20 + 3.30
= $14.50
Answer(s): $14.50
