Bryan has 600 stickers more than Adam.
Bryan gives Adam 100 stickers.
Now, Bryan has 3 times as many stickers as Adam.
- How many stickers does Bryan have in the end?
- How many stickers does Adam have in the end?
|
Bryan |
Adam |
Before |
3 u + 100 |
1 u - 100 |
Change |
- 100 |
+ 100 |
After |
3 u |
1 u |
(a)
At first
Number of stickers that Bryan has = 3 u + 100
Number of stickers that Adam has = 1 u - 100
In the end
Number of stickers that Bryan has = 3 u
Number of stickers that Adam has = 1 u
If the number of stickers that Adam has at first increases by 600, he will have as many stickers as Bryan at first.
3 u + 100 = 1 u - 100 + 600
3 u + 100 = 1 u + 500
3 u - 1 u = 500 - 100
2 u = 400
1 u = 400 ÷ 2 = 200
Number of stickers that Bryan in the end
= 3 u
= 3 x 200
= 600
(b)
Number of stickers that Adam has in the end
= 1 u
= 200
Answer(s): (a) 600; (b) 200