Luis and Justin had the same number of cards at first. After Luis had bought another 36 cards and Justin had lost 6 of his cards, Luis had four times as many cards as Justin. How many cards did each of them have at first?
| |
Justin |
Luis |
| Before |
1 u + 6 |
4 u - 36 |
| Change |
- 6 |
+ 36 |
| After |
1 u |
4 u |
Luis and Justin had the same number of cards at first.
4 u - 36 = 1 u + 6
4 u - 1 u = 6 + 36
3 u = 42
1 u = 42 ÷ 3 = 14
Number of cards that each of them had at first
= 1 u + 6
= 14 + 6
= 20
Answer(s): 20
