Bryan and Adam have 170 stickers.
After Bryan gives Adam 17 stickers,
Bryan has 70 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 + 87 |
1 u - 17 |
Change |
- 17 |
+ 17 |
After |
1 u + 70 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 70
= 2 u + 70
2 u + 70 = 170
2 u = 170 - 70
2 u = 100
1 u = 100 ÷ 2 = 50
Number of stickers that Bryan has at first
= 1 u + 87
= 50 + 87
= 137
(b)
Number of stickers that Adam has in the end
= 1 u
= 50
Answer(s): (a) 137; (b) 50