John had 3 times as much money as Tommy. After Tommy's father gave Tommy $25, the amount of money John had become $5 less than that of Tommy's. How much did Tommy have in the end?
| |
Tommy |
John |
| Before |
1 u |
3 u |
| Change |
+ $25 |
|
| After |
1 u + $25 |
3 u |
The amount that John had remains unchanged.
If John had another $5, Tommy and John would have the same amount in the end.
3 u + 5 = 1 u + 25
3 u - 1 u = 25 - 5
2 u = 25 - 5
2 u = 20
1 u = 20 ÷ 2 = 10
Amount that Tommy had in the end
= 1 u + 25
= 10 + 25
= $35
Answer(s): $35
