Peter and Valen had a total of $137. Peter gave $17 to Valen. In return, Valen gave $40 to Peter. In the end, Peter had $37 more than Valen. How much money did Peter have at first?
| |
Peter |
Valen |
Total |
| Before |
? |
|
$137 |
| Change 1 |
- $17 |
+ $17 |
|
| Change 2 |
+ $40 |
- $40 |
|
| After |
1 u + $37 |
1 u |
$137 |
Total amount that Peter and Valen had
= 1 u + 1 u + $37
= 2 u + 37
2 u + 37 = 137
2 u = 137 - 37
2 u = 100
1 u = 100 ÷ 2 = 50
Amount that Peter had in the end
= 1 u + 37
= 50 + 37
= $87
Amount that Peter had at first
= 87 - 40 + 17
= $64
Answer(s): $64
