Min and Gillian went shopping. After Min spent $50
k, Gillian had 3 times as much as Min. If Min had $25
k more than Gillian at first,
- Express the amount of money that Min had at first in terms of k.
- If k = 29, find the amount of money that the two lady had left after shopping.
|
Min |
Gillian |
Before |
1 u + $50k |
3 u |
Change |
- $50k |
|
After |
1 u |
3 u |
(a)
1 u + 50
k = 3 u + 25
k3 u - 1 u = 50
k - 25
k2 u = 50
k - 25
k = 25
k1 u = 25
k ÷ 2 = 12.5
k Min's amount at first
= 1 u + 50
k = 12.5
k + 50
k = $62.5
k (b)
1 u + 3 u = 4 u
4 u = 4 x 12.5
k = 50
k Amount the two lady had left
= 50 x 29
= $1450
Answer(s): (a) $62.5
k; (b) $1450