Bryan has 500 stickers more than Adam.
Bryan gives Adam 100 stickers.
Now, Bryan has 3 times as many stickers as Adam.

1. How many stickers does Bryan have in the end?
2. 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 500, he will have as many stickers as Bryan at first.

3 u + 100 = 1 u - 100 + 500
3 u + 100 = 1 u + 400
3 u - 1 u = 400 - 100
2 u = 300

1 u = 300 ÷ 2 = 150

Number of stickers that Bryan in the end
= 3 u 
= 3 x 150
= 450

(b)
Number of stickers that Adam has in the end
= 1 u 
= 150

Answer(s): (a) 450; (b) 150