Bryan and Adam have some stickers.
When Bryan gives Adam some stickers,
Bryan's stickers is doubled.
In the end, both have 70 stickers each.
- How many stickers does Adam have at first?
- How many stickers does Bryan have at first?
|
Bryan |
Adam |
Before |
1 u + 70 |
1 u |
Change |
- 1 u |
+ 1 u |
After |
70 |
2 u = 70 |
(a)
To double the number of stickers that Adam has
= 2 x 1 u
= 2 u
2 u = 70
1 u = 70 ÷ 2 = 35
Number of stickers that Adam has at first
= 1 u
= 35
(b)
Number of stickers that Bryan has at first
= 1 u + 70
= 35 + 70
= 105
Answer(s): (a) 35; (b) 105