Bryan and Adam have 110 stickers.
After Bryan gives Adam 11 stickers,
Bryan has 10 more stickers than Adam.
- How many stickers does Bryan have at first?
- How many stickers does Adam have in the end?
|
Bryan |
Adam |
Before |
1 u + 21 |
1 u - 11 |
Change |
- 11 |
+ 11 |
After |
1 u + 10 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 10
= 2 u + 10
2 u + 10 = 110
2 u = 110 - 10
2 u = 100
1 u = 100 ÷ 2 = 50
Number of stickers that Bryan has at first
= 1 u + 21
= 50 + 21
= 71
(b)
Number of stickers that Adam has in the end
= 1 u
= 50
Answer(s): (a) 71; (b) 50