Adam and Bryan have 200 stickers.
After Adam gives Bryan 20 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 + 190 |
1 u - 20 |
Change |
- 20 |
+ 20 |
After |
1 u + 170 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 170
= 2 u + 170
2 u + 170 = 200
2 u = 200 - 170
2 u = 30
1 u = 30 ÷ 2 = 15
Number of stickers that Adam has at first
= 1 u + 190
= 15 + 190
= 205
(b)
Number of stickers that Bryan has in the end
= 1 u
= 15
Answer(s): (a) 205; (b) 15