35 Yen's money was equal to
23 of Betty's money at first. After Yen spent $2.40 and Betty spent $0.90, Yen had
45 as much money as Betty.
- How much did Betty have at first? Express your answer in 2 decimal places.
- How much did Yen have in the end? Express your answer in 2 decimal places.
|
Make p the same (3)x5 |
Yen (1) |
Betty (2) |
Make p the same (4)x4 |
Before |
50 u |
10 u |
9 u |
36 u |
Change |
- 12 |
- 2.4 |
- 0.9 |
- 3.6 |
After |
20 p |
4 p |
5p |
20 p |
35 Yen's money =
23 Betty's money
610 Yen's money =
69 Betty's money
Yen's money : Betty's money = 10 : 9
(3) = (4)
50 u - 12 = 36 u - 3.6
50 u - 36 u = 12 - 3.6
14 u = 8.4
1 u = 0.6
Amount Betty has at first
= 9 u
= 9 x 0.6
= 5.4 (a)
Amount Yen has in the end
= 10 u - 2.4
= (10 x 0.6) - 2.4
= 3.6 (b)
Answers: (a) $5.40; (b) $3.60