Valen and Charlie had the same number of cards at first. After Valen had bought another 30 cards and Charlie had lost 10 of his cards, Valen had five times as many cards as Charlie. How many cards did each of them have at first?
| |
Charlie |
Valen |
| Before |
1 u + 10 |
5 u - 30 |
| Change |
- 10 |
+ 30 |
| After |
1 u |
5 u |
Valen and Charlie had the same number of cards at first.
5 u - 30 = 1 u + 10
5 u - 1 u = 10 + 30
4 u = 40
1 u = 40 ÷ 4 = 10
Number of cards that each of them had at first
= 1 u + 10
= 10 + 10
= 20
Answer(s): 20
