Adam and Bryan have 300 stickers.
After Adam gives Bryan 30 stickers,
Adam has 40 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 + 70 |
1 u - 30 |
Change |
- 30 |
+ 30 |
After |
1 u + 40 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 40
= 2 u + 40
2 u + 40 = 300
2 u = 300 - 40
2 u = 260
1 u = 260 ÷ 2 = 130
Number of stickers that Adam has at first
= 1 u + 70
= 130 + 70
= 200
(b)
Number of stickers that Bryan has in the end
= 1 u
= 130
Answer(s): (a) 200; (b) 130