Adam and Bryan have some stickers.
When Adam gives Bryan some stickers,
Bryan's stickers is doubled.
In the end, both have 30 stickers each.
- How many stickers does Bryan have at first?
- How many stickers does Adam have at first?
|
Adam |
Bryan |
Before |
1 u + 30 |
1 u |
Change |
- 1 u |
+ 1 u |
After |
30 |
2 u = 30 |
(a)
To double the number of stickers that Bryan has
= 2 x 1 u
= 2 u
2 u = 30
1 u = 30 ÷ 2 = 15
Number of stickers that Bryan has at first
= 1 u
= 15
(b)
Number of stickers that Adam has at first
= 1 u + 30
= 15 + 30
= 45
Answer(s): (a) 15; (b) 45