Winnie and Lynn had the same number of cards. After Winnie had given away 78 cards, Lynn had 3 times as many cards as Winnie. How many cards did each of them have at first?
| |
Winnie |
Lynn |
| Before |
1 u + 78 |
3 u |
| Change |
- 78 |
|
| After |
1 u |
3 u |
Number of cards that Lynn had remains unchanged.
Number of cards that Winnie and Lynn had at first is equal.
3 u = 1 u + 78
3 u - 1 u = 78
2 u = 78
1 u = 78 ÷ 2= 39
Number of cards that each of them had at first
= 1 u + 78
= 39 + 78
= 117
Answer(s): 117
