Bobby and Ken have a total of 60 cards. If Bobby gives Ken 15 cards, Ken will have 5 times as many cards as him. Find
(a) Bobby's cards
(b) Ken's cards
|
Bobby |
Ken |
Total |
Before |
1 u + 15 |
5 u - 15 |
60 |
Change |
- 15 |
+ 15 |
|
After |
1 u |
5 u |
6 u |
(a)
Total number of cards
= 1 u + 5 u
= 6 u
6 u = 60
1 u = 60 ÷ 6 = 10
Number of cards that Bobby has
= 1 u + 15
= 10 + 15
= 25
(b)
Number of cards that Ken has
= 60 - 25
= 35
Answer(s): (a) 25; (b) 35