Adam and Bryan have 400 stickers.
After Adam gives Bryan 40 stickers,
Adam has 180 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 + 220 |
1 u - 40 |
Change |
- 40 |
+ 40 |
After |
1 u + 180 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 180
= 2 u + 180
2 u + 180 = 400
2 u = 400 - 180
2 u = 220
1 u = 220 ÷ 2 = 110
Number of stickers that Adam has at first
= 1 u + 220
= 110 + 220
= 330
(b)
Number of stickers that Bryan has in the end
= 1 u
= 110
Answer(s): (a) 330; (b) 110