Bryan and Adam have 420 stickers.
After Bryan gives Adam 42 stickers,
Bryan has 80 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 + 122 |
1 u - 42 |
Change |
- 42 |
+ 42 |
After |
1 u + 80 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 80
= 2 u + 80
2 u + 80 = 420
2 u = 420 - 80
2 u = 340
1 u = 340 ÷ 2 = 170
Number of stickers that Bryan has at first
= 1 u + 122
= 170 + 122
= 292
(b)
Number of stickers that Adam has in the end
= 1 u
= 170
Answer(s): (a) 292; (b) 170