Adam and Bryan have 400 stickers.
After Adam gives Bryan 40 stickers,
Adam has 70 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 + 110 |
1 u - 40 |
Change |
- 40 |
+ 40 |
After |
1 u + 70 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 70
= 2 u + 70
2 u + 70 = 400
2 u = 400 - 70
2 u = 330
1 u = 330 ÷ 2 = 165
Number of stickers that Adam has at first
= 1 u + 110
= 165 + 110
= 275
(b)
Number of stickers that Bryan has in the end
= 1 u
= 165
Answer(s): (a) 275; (b) 165