Bryan and Adam have 420 stickers.
After Bryan gives Adam 42 stickers,
Bryan has 30 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 + 72 |
1 u - 42 |
Change |
- 42 |
+ 42 |
After |
1 u + 30 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 30
= 2 u + 30
2 u + 30 = 420
2 u = 420 - 30
2 u = 390
1 u = 390 ÷ 2 = 195
Number of stickers that Bryan has at first
= 1 u + 72
= 195 + 72
= 267
(b)
Number of stickers that Adam has in the end
= 1 u
= 195
Answer(s): (a) 267; (b) 195