Flynn had thrice as much money as Zeph. After Flynn had spent $120, Zeph had thrice as much money as Flynn. How much more money than Zeph had Flynn at first?
| |
Flynn |
Zeph |
More |
Before
|
3x3 =
9 u |
1x3 =
3 u |
6 u |
| Change |
- $120 |
|
|
| After |
1 u |
3 u |
|
The amount that Zeph had remains unchanged. Make the amount that Zeph had the same. LCM of 1 and 3 is 3.
Amount that Mark had in the end = 1 u
9 u - 120 = 1 u
9 u - 1 u = 120
8 u = 120
1 u = 120 ÷ 8 = 15
Amount that Zeph had more than Flynn at first
= 9 u - 3 u
= 6 u
= 6 x 15
= $90
Answer(s): $90
