Betty and Linda went shopping. After Betty spent $81
g, Linda had 3 times as much as Betty. If Betty had $22
g more than Linda at first,
- Express the amount of money that Betty had at first in terms of g.
- If g = 16, find the amount of money that the two lady had left after shopping.
|
Betty |
Linda |
Before |
1 u + $81g |
3 u |
Change |
- $81g |
|
After |
1 u |
3 u |
(a)
1 u + 81
g = 3 u + 22
g3 u - 1 u = 81
g - 22
g2 u = 81
g - 22
g = 59
g1 u = 59
g ÷ 2 = 29.5
g Betty's amount at first
= 1 u + 81
g = 29.5
g + 81
g = $110.5
g (b)
1 u + 3 u = 4 u
4 u = 4 x 29.5
g = 118
g Amount the two lady had left
= 118 x 16
= $1888
Answer(s): (a) $110.5
g; (b) $1888