Roshel and Xandra went shopping. After Roshel spent $68
f, Xandra had 4 times as much as Roshel. If Roshel had $26
f more than Xandra at first,
- Express the amount of money that Roshel had at first in terms of f.
- If f = 25, find the amount of money that the two lady had left after shopping.
|
Roshel |
Xandra |
Before |
1 u + $68f |
4 u |
Change |
- $68f |
|
After |
1 u |
4 u |
(a)
1 u + 68
f = 4 u + 26
f4 u - 1 u = 68
f - 26
f3 u = 68
f - 26
f = 42
f1 u = 42
f ÷ 3 = 14
f Roshel's amount at first
= 1 u + 68
f = 14
f + 68
f = $82
f (b)
1 u + 4 u = 5 u
5 u = 5 x 14
f = 70
f Amount the two lady had left
= 70 x 25
= $1750
Answer(s): (a) $82
f; (b) $1750