The ratio of the amount of money Risa had to the amount of money Lynn had was 5 : 6. Risa then gave
45 of her money to Lynn. In the end, Lynn returned $63 to Risa and they both had the same amount of money. How much money did each girl have at the beginning?
- Lynn
- Risa
|
Risa |
Lynn |
Total |
Before |
5 u |
6 u |
11 u |
Change 1 |
- 4 u |
+ 4 u |
|
After 1 |
1 u |
10 u |
11 u |
Change 2 |
+ 63 |
- 63 |
|
After 2 |
1 u + 63 |
10 u - 63 |
|
Amount that Risa and Lynn each had in the end is the same.
10 u - 63 = 1 u + 63
10 u - 1 u = 63 + 63
9 u = 126
1 u = 126 ÷ 9 = 14
Amount that Risa had at first
= 5 u
= 5 x 14
= $70
(b)
Amount that Lynn had at first
= 6 u
= 6 x 14
= $84
Answer(s): (a) $70; (b) $84