Jenson had seven times as much money as Eric. After Jenson had spent $120, Eric had thrice as much money as Jenson. How much more money than Eric had Jenson at first?
| |
Jenson |
Eric |
More |
Before
|
7x3 =
21 u |
1x3 =
3 u |
18 u |
| Change |
- $120 |
|
|
| After |
1 u |
3 u |
|
The amount that Eric had remains unchanged. Make the amount that Eric had the same. LCM of 1 and 3 is 3.
Amount that Mark had in the end = 1 u
21 u - 120 = 1 u
21 u - 1 u = 120
20 u = 120
1 u = 120 ÷ 20 = 6
Amount that Eric had more than Jenson at first
= 21 u - 3 u
= 18 u
= 18 x 6
= $108
Answer(s): $108
