Bryan and Adam have 400 stickers.
After Bryan gives Adam 40 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 + 50 |
1 u - 40 |
Change |
- 40 |
+ 40 |
After |
1 u + 10 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 10
= 2 u + 10
2 u + 10 = 400
2 u = 400 - 10
2 u = 390
1 u = 390 ÷ 2 = 195
Number of stickers that Bryan has at first
= 1 u + 50
= 195 + 50
= 245
(b)
Number of stickers that Adam has in the end
= 1 u
= 195
Answer(s): (a) 245; (b) 195