Adam and Bryan have 490 stickers.
After Adam gives Bryan 49 stickers,
Adam has 430 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 + 479 |
1 u - 49 |
Change |
- 49 |
+ 49 |
After |
1 u + 430 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 430
= 2 u + 430
2 u + 430 = 490
2 u = 490 - 430
2 u = 60
1 u = 60 ÷ 2 = 30
Number of stickers that Adam has at first
= 1 u + 479
= 30 + 479
= 509
(b)
Number of stickers that Bryan has in the end
= 1 u
= 30
Answer(s): (a) 509; (b) 30