David had thrice as much money as Oliver. After David had spent $119, Oliver had six times as much money as David. How much more money than Oliver had David at first?
| |
David |
Oliver |
More |
Before
|
3x6 =
18 u |
1x6 =
6 u |
12 u |
| Change |
- $119 |
|
|
| After |
1 u |
6 u |
|
The amount that Oliver had remains unchanged. Make the amount that Oliver had the same. LCM of 1 and 6 is 6.
Amount that Mark had in the end = 1 u
18 u - 119 = 1 u
18 u - 1 u = 119
17 u = 119
1 u = 119 ÷ 17 = 7
Amount that Oliver had more than David at first
= 18 u - 6 u
= 12 u
= 12 x 7
= $84
Answer(s): $84
