Adam and Bryan have 40 stickers.
After Adam gives Bryan 4 stickers,
Adam has 30 more stickers than Bryan.
- How many stickers does Adam have at first?
- How many stickers does Bryan have in the end?
|
Adam |
Bryan |
Before |
1 u + 34 |
1 u - 4 |
Change |
- 4 |
+ 4 |
After |
1 u + 30 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 30
= 2 u + 30
2 u + 30 = 40
2 u = 40 - 30
2 u = 10
1 u = 10 ÷ 2 = 5
Number of stickers that Adam has at first
= 1 u + 34
= 5 + 34
= 39
(b)
Number of stickers that Bryan has in the end
= 1 u
= 5
Answer(s): (a) 39; (b) 5