Dana and Julie had the same number of cards. After Dana had given away 66 cards, Julie had 7 times as many cards as Dana. How many cards did each of them have at first?
| |
Dana |
Julie |
| Before |
1 u + 66 |
7 u |
| Change |
- 66 |
|
| After |
1 u |
7 u |
Number of cards that Julie had remains unchanged.
Number of cards that Dana and Julie had at first is equal.
7 u = 1 u + 66
7 u - 1 u = 66
6 u = 66
1 u = 66 ÷ 6= 11
Number of cards that each of them had at first
= 1 u + 66
= 11 + 66
= 77
Answer(s): 77
