Adam has 800 stickers more than Bryan.
Adam gives Bryan 100 stickers.
Now, Adam has 4 times as many stickers as Bryan.
- How many stickers does Adam have in the end?
- How many stickers does Bryan have in the end?
|
Adam |
Bryan |
Before |
4 u + 100 |
1 u - 100 |
Change |
- 100 |
+ 100 |
After |
4 u |
1 u |
(a)
At first
Number of stickers that Adam has = 4 u + 100
Number of stickers that Bryan has = 1 u - 100
In the end
Number of stickers that Adam has = 4 u
Number of stickers that Bryan has = 1 u
If the number of stickers that Bryan has at first increases by 800, he will have as many stickers as Adam at first.
4 u + 100 = 1 u - 100 + 800
4 u + 100 = 1 u + 700
4 u - 1 u = 700 - 100
3 u = 600
1 u = 600 ÷ 3 = 200
Number of stickers that Adam in the end
= 4 u
= 4 x 200
= 800
(b)
Number of stickers that Bryan has in the end
= 1 u
= 200
Answer(s): (a) 800; (b) 200