Adam and Bryan have 390 stickers.
After Adam gives Bryan 39 stickers,
Adam has 310 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 + 349 |
1 u - 39 |
Change |
- 39 |
+ 39 |
After |
1 u + 310 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 310
= 2 u + 310
2 u + 310 = 390
2 u = 390 - 310
2 u = 80
1 u = 80 ÷ 2 = 40
Number of stickers that Adam has at first
= 1 u + 349
= 40 + 349
= 389
(b)
Number of stickers that Bryan has in the end
= 1 u
= 40
Answer(s): (a) 389; (b) 40