Adam and Bryan have 20 stickers.
After Adam gives Bryan 2 stickers,
Adam has 10 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 + 12 |
1 u - 2 |
Change |
- 2 |
+ 2 |
After |
1 u + 10 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 10
= 2 u + 10
2 u + 10 = 20
2 u = 20 - 10
2 u = 10
1 u = 10 ÷ 2 = 5
Number of stickers that Adam has at first
= 1 u + 12
= 5 + 12
= 17
(b)
Number of stickers that Bryan has in the end
= 1 u
= 5
Answer(s): (a) 17; (b) 5