Adam and Bryan have 280 stickers.
After Adam gives Bryan 28 stickers,
Adam has 50 more stickers than Bryan.
- How many stickers does Adam have at first?
- How many stickers does Bryan have in the end?
|
Adam |
Bryan |
Before |
1 u + 78 |
1 u - 28 |
Change |
- 28 |
+ 28 |
After |
1 u + 50 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 50
= 2 u + 50
2 u + 50 = 280
2 u = 280 - 50
2 u = 230
1 u = 230 ÷ 2 = 115
Number of stickers that Adam has at first
= 1 u + 78
= 115 + 78
= 193
(b)
Number of stickers that Bryan has in the end
= 1 u
= 115
Answer(s): (a) 193; (b) 115