Adam and Bryan have 310 stickers.
After Adam gives Bryan 31 stickers,
Adam has 290 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 + 321 |
1 u - 31 |
Change |
- 31 |
+ 31 |
After |
1 u + 290 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 290
= 2 u + 290
2 u + 290 = 310
2 u = 310 - 290
2 u = 20
1 u = 20 ÷ 2 = 10
Number of stickers that Adam has at first
= 1 u + 321
= 10 + 321
= 331
(b)
Number of stickers that Bryan has in the end
= 1 u
= 10
Answer(s): (a) 331; (b) 10