Linda and Joelle had the same number of cards. After Linda had given away 72 cards, Joelle had 9 times as many cards as Linda. How many cards did each of them have at first?
| |
Linda |
Joelle |
| Before |
1 u + 72 |
9 u |
| Change |
- 72 |
|
| After |
1 u |
9 u |
Number of cards that Joelle had remains unchanged.
Number of cards that Linda and Joelle had at first is equal.
9 u = 1 u + 72
9 u - 1 u = 72
8 u = 72
1 u = 72 ÷ 8= 9
Number of cards that each of them had at first
= 1 u + 72
= 9 + 72
= 81
Answer(s): 81
