Bryan and Adam have some stickers.
When Bryan gives Adam some stickers,
Bryan's stickers is tripled.
In the end, both have 90 stickers each.
- How many stickers does Adam have at first?
- How many stickers does Bryan have at first?
|
Bryan |
Adam |
Before |
2 u + 90 |
1 u |
Change |
- 2 u |
+ 2 u |
After |
90 |
3 u = 90 |
(a)
To triple the number of stickers that Adam has
= 3 x 1 u
= 3 u
3 u = 90
1 u = 90 ÷ 3 = 30
Number of stickers that Adam has at first
= 1 u
= 30
(b)
Number of stickers that Bryan has at first
= 2 u + 90
= 2 x 30 + 90
= 60 + 90
= 150
Answer(s): (a) 30; (b) 150