Andy and Zeph had the same number of cards at first. After Andy had bought another 28 cards and Zeph had lost 6 of his cards, Andy had thrice as many cards as Zeph. How many cards did each of them have at first?
| |
Zeph |
Andy |
| Before |
1 u + 6 |
3 u - 28 |
| Change |
- 6 |
+ 28 |
| After |
1 u |
3 u |
Andy and Zeph had the same number of cards at first.
3 u - 28 = 1 u + 6
3 u - 1 u = 6 + 28
2 u = 34
1 u = 34 ÷ 2 = 17
Number of cards that each of them had at first
= 1 u + 6
= 17 + 6
= 23
Answer(s): 23
