Adam and Bryan have 400 stickers.
After Adam gives Bryan 40 stickers,
Adam has 170 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 + 210 |
1 u - 40 |
Change |
- 40 |
+ 40 |
After |
1 u + 170 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 170
= 2 u + 170
2 u + 170 = 400
2 u = 400 - 170
2 u = 230
1 u = 230 ÷ 2 = 115
Number of stickers that Adam has at first
= 1 u + 210
= 115 + 210
= 325
(b)
Number of stickers that Bryan has in the end
= 1 u
= 115
Answer(s): (a) 325; (b) 115