Adam and Bryan have 390 stickers.
After Adam gives Bryan 39 stickers,
Adam has 150 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 + 189 |
1 u - 39 |
Change |
- 39 |
+ 39 |
After |
1 u + 150 |
1 u |
(a)
Total number of stickers
= 1 u + 1 u + 150
= 2 u + 150
2 u + 150 = 390
2 u = 390 - 150
2 u = 240
1 u = 240 ÷ 2 = 120
Number of stickers that Adam has at first
= 1 u + 189
= 120 + 189
= 309
(b)
Number of stickers that Bryan has in the end
= 1 u
= 120
Answer(s): (a) 309; (b) 120