Betty and Fanny had the same number of cards. After Betty had given away 60 cards, Fanny had 7 times as many cards as Betty. How many cards did each of them have at first?
| |
Betty |
Fanny |
| Before |
1 u + 60 |
7 u |
| Change |
- 60 |
|
| After |
1 u |
7 u |
Number of cards that Fanny had remains unchanged.
Number of cards that Betty and Fanny had at first is equal.
7 u = 1 u + 60
7 u - 1 u = 60
6 u = 60
1 u = 60 ÷ 6= 10
Number of cards that each of them had at first
= 1 u + 60
= 10 + 60
= 70
Answer(s): 70
