Cody had four times as much money as Ivan. After Cody had spent $117, Ivan had ten times as much money as Cody. How much more money than Ivan had Cody at first?
| |
Cody |
Ivan |
More |
Before
|
4x10 =
40 u |
1x10 =
10 u |
30 u |
| Change |
- $117 |
|
|
| After |
1 u |
10 u |
|
The amount that Ivan had remains unchanged. Make the amount that Ivan had the same. LCM of 1 and 10 is 10.
Amount that Mark had in the end = 1 u
40 u - 117 = 1 u
40 u - 1 u = 117
39 u = 117
1 u = 117 ÷ 39 = 3
Amount that Ivan had more than Cody at first
= 40 u - 10 u
= 30 u
= 30 x 3
= $90
Answer(s): $90
