There are 80 stickers in Container F and 50 stickers in Container G.
Some stickers are transferred from Container F to Container G.
Container F has 20 more stickers than Container G.
How many stickers are transferred from Container F to Container G?

	Container F	Container G
Before	80	50
Change	- ?	+ ?
After	1 u + 20	1 u

Total number of stickers
= 80 + 50
= 130

Total number of stickers in the end = 1 u + 20 + 1 u = 2 u + 20

The total number of stickers at first and in the end remains unchanged.

2 u + 20 = 130
2 u = 130 - 20 = 110

1 u = 110 ÷ 2 = 55

Number of stickers that are transferred from Container F to Container G
= Number of stickers in Container G in the end - Number of stickers in Container G at first
= 55 - 50
= 5

Answer(s): 5