Andy had $3.70 less than Peter. After Andy gave $1.30 to Peter, Peter would have four times as much money as Andy. How much money had Peter at first?
| |
Peter |
Andy |
| Before |
4 u - $1.30 |
1 u + $1.30 |
| Change |
+ $1.30 |
- $1.30 |
| After |
4 u |
1 u |
Andy had $3.70 less than Peter. If another $3.70 was given to Andy, Peter and Andy would have the same amount at first.
4 u - 1.30 = 1 u + 1.30 + 3.70
4 u - 1 u = 1.30 + 3.70 + 1.30
3 u = 6.30
1 u = 6.30 ÷ 3 = 2.10
Amount that Peter had at first
= 4 u - 1.30
= 4 x 2.10 + 1.30
= 8.40 + 1.30
= $9.70
Answer(s): $9.70
