Bryan and Adam have 390 stickers.
After Bryan gives Adam 39 stickers,
Bryan has 350 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 + 389 |
1 u - 39 |
Change |
- 39 |
+ 39 |
After |
1 u + 350 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 350
= 2 u + 350
2 u + 350 = 390
2 u = 390 - 350
2 u = 40
1 u = 40 ÷ 2 = 20
Number of stickers that Bryan has at first
= 1 u + 389
= 20 + 389
= 409
(b)
Number of stickers that Adam has in the end
= 1 u
= 20
Answer(s): (a) 409; (b) 20