45 Tammy's money was equal to
23 of Cindy's money at first. After Tammy spent $2.10 and Cindy spent $1.20, Tammy had
34 as much money as Cindy.
- How much did Cindy have at first? Express your answer in 2 decimal places.
- How much did Tammy have in the end? Express your answer in 2 decimal places.
| |
Make p the same
(3)x4 |
Tammy
(1) |
Cindy
(2) |
Make p the same
(4)x3 |
| Before |
20 u |
5 u |
6 u |
18 u |
| Change |
- 8.4 |
- 2.1 |
- 1.2 |
- 3.6 |
| After |
12 p |
3 p |
4p |
12 p |
45 Tammy's money =
23 Cindy's money
45 Tammy's money =
46 Cindy's money
Tammy's money : Cindy's money = 5 : 6
(3) = (4)
20 u - 8.4 = 18 u - 3.6
20 u - 18 u = 8.4 - 3.6
2 u = 4.8
1 u = 2.4
Amount Cindy has at first
= 6 u
= 6 x 2.4
= 14.4 (a)
Amount Tammy has in the end
= 5 u - 2.1
= (5 x 2.4) - 2.1
= 9.9 (b)
Answers: (a) $14.40; (b) $9.90
