Bryan had five times as much money as Oliver. After Bryan had spent $98, Oliver had ten times as much money as Bryan. How much more money than Oliver had Bryan at first?
| |
Bryan |
Oliver |
More |
Before
|
5x10 =
50 u |
1x10 =
10 u |
40 u |
| Change |
- $98 |
|
|
| After |
1 u |
10 u |
|
The amount that Oliver had remains unchanged. Make the amount that Oliver had the same. LCM of 1 and 10 is 10.
Amount that Mark had in the end = 1 u
50 u - 98 = 1 u
50 u - 1 u = 98
49 u = 98
1 u = 98 ÷ 49 = 2
Amount that Oliver had more than Bryan at first
= 50 u - 10 u
= 40 u
= 40 x 2
= $80
Answer(s): $80
