Kimberly went shopping with twice as much money as Elyse. After Kimberly spent $210, Elyse had four times as much money as Kimberly had left. How much less money did Elyse bring along for shopping than Kimberly?
| |
Kimberly |
Elyse |
Difference |
| Before |
2x4 =
8 u |
1x4 =
4 u |
4 u |
| Change |
- $210 |
|
|
| After |
1 u |
4 u |
|
The amount that Elyse has remains unchanged at first and in the end. Make the amount that Elyse has the same. LCM of 1 and 4 is 4.
Amount that Kimberly spent
= 8 u - 1 u
= 7 u
7 u = 210
1 u = 210 ÷ 7 = 30
Amount that Elyse brought along less than Kimberly
= 8 u - 4 u
= 4 u
= 4 x 30
= $120
Answer(s): $120
