Bryan and Adam have 310 stickers.
After Bryan gives Adam 31 stickers,
Bryan has 50 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 + 81 |
1 u - 31 |
Change |
- 31 |
+ 31 |
After |
1 u + 50 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 50
= 2 u + 50
2 u + 50 = 310
2 u = 310 - 50
2 u = 260
1 u = 260 ÷ 2 = 130
Number of stickers that Bryan has at first
= 1 u + 81
= 130 + 81
= 211
(b)
Number of stickers that Adam has in the end
= 1 u
= 130
Answer(s): (a) 211; (b) 130