Tommy had four times as much money as Oliver. After Tommy had spent $120, Oliver had four times as much money as Tommy. How much more money than Oliver had Tommy at first?
| |
Tommy |
Oliver |
More |
Before
|
4x4 =
16 u |
1x4 =
4 u |
12 u |
| Change |
- $120 |
|
|
| After |
1 u |
4 u |
|
The amount that Oliver had remains unchanged. Make the amount that Oliver had the same. LCM of 1 and 4 is 4.
Amount that Mark had in the end = 1 u
16 u - 120 = 1 u
16 u - 1 u = 120
15 u = 120
1 u = 120 ÷ 15 = 8
Amount that Oliver had more than Tommy at first
= 16 u - 4 u
= 12 u
= 12 x 8
= $96
Answer(s): $96
