Archie had 4 times as much money as Billy. After Billy's father gave Billy $39, the amount of money Archie had become $6 less than that of Billy's. How much did Billy have in the end?
| |
Billy |
Archie |
| Before |
1 u |
4 u |
| Change |
+ $39 |
|
| After |
1 u + $39 |
4 u |
The amount that Archie had remains unchanged.
If Archie had another $6, Billy and Archie would have the same amount in the end.
4 u + 6 = 1 u + 39
4 u - 1 u = 39 - 6
3 u = 39 - 6
3 u = 33
1 u = 33 ÷ 3 = 11
Amount that Billy had in the end
= 1 u + 39
= 11 + 39
= $50
Answer(s): $50
