Adam and Bryan have 390 stickers.
After Adam gives Bryan 39 stickers,
Adam has 270 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 + 309 |
1 u - 39 |
Change |
- 39 |
+ 39 |
After |
1 u + 270 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 270
= 2 u + 270
2 u + 270 = 390
2 u = 390 - 270
2 u = 120
1 u = 120 ÷ 2 = 60
Number of stickers that Adam has at first
= 1 u + 309
= 60 + 309
= 369
(b)
Number of stickers that Bryan has in the end
= 1 u
= 60
Answer(s): (a) 369; (b) 60