Hilda and Shiyun went shopping. After Hilda spent $59
s, Shiyun had 3 times as much as Hilda. If Hilda had $29
s more than Shiyun at first,
- Express the amount of money that Hilda had at first in terms of s.
- If s = 40, find the amount of money that the two lady had left after shopping.
|
Hilda |
Shiyun |
Before |
1 u + $59s |
3 u |
Change |
- $59s |
|
After |
1 u |
3 u |
(a)
1 u + 59
s = 3 u + 29
s3 u - 1 u = 59
s - 29
s2 u = 59
s - 29
s = 30
s1 u = 30
s ÷ 2 = 15
s Hilda's amount at first
= 1 u + 59
s = 15
s + 59
s = $74
s (b)
1 u + 3 u = 4 u
4 u = 4 x 15
s = 60
s Amount the two lady had left
= 60 x 40
= $2400
Answer(s): (a) $74
s; (b) $2400