45 Emily's money was equal to
23 of Erika's money at first. After Emily spent $1.70 and Erika spent $0.90, Emily had
23 as much money as Erika.
- How much did Erika have at first? Express your answer in 2 decimal places.
- How much did Emily have in the end? Express your answer in 2 decimal places.
|
Make p the same (3)x3 |
Emily (1) |
Erika (2) |
Make p the same (4)x2 |
Before |
15 u |
5 u |
6 u |
12 u |
Change |
- 5.1 |
- 1.7 |
- 0.9 |
- 1.8 |
After |
6 p |
2 p |
3p |
6 p |
45 Emily's money =
23 Erika's money
45 Emily's money =
46 Erika's money
Emily's money : Erika's money = 5 : 6
(3) = (4)
15 u - 5.1 = 12 u - 1.8
15 u - 12 u = 5.1 - 1.8
3 u = 3.3
1 u = 1.1
Amount Erika has at first
= 6 u
= 6 x 1.1
= 6.6 (a)
Amount Emily has in the end
= 5 u - 1.7
= (5 x 1.1) - 1.7
= 3.8 (b)
Answers: (a) $6.60; (b) $3.80