Ken had thrice as much money as Vaidev. After Ken had spent $104, Vaidev had nine times as much money as Ken. How much more money than Vaidev had Ken at first?
| |
Ken |
Vaidev |
More |
Before
|
3x9 =
27 u |
1x9 =
9 u |
18 u |
| Change |
- $104 |
|
|
| After |
1 u |
9 u |
|
The amount that Vaidev had remains unchanged. Make the amount that Vaidev had the same. LCM of 1 and 9 is 9.
Amount that Mark had in the end = 1 u
27 u - 104 = 1 u
27 u - 1 u = 104
26 u = 104
1 u = 104 ÷ 26 = 4
Amount that Vaidev had more than Ken at first
= 27 u - 9 u
= 18 u
= 18 x 4
= $72
Answer(s): $72
