There are 80 stickers in Container D and 65 stickers in Container E.
Some stickers are transferred from Container D to Container E.
Container E has 55 more stickers than Container D.
How many stickers are transferred from Container D to Container E?

	Container D	Container E
Before	80	65
Change	- ?	+ ?
After	1 u	1 u + 55

Total number of stickers
= 80 + 65
= 145

In the end
Total number of stickers = 1 u + 1 u + 55 = 2 u + 55

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

2 u + 55 = 145
2 u = 145 - 55 = 90

1 u = 90 ÷ 2 = 45

Number of stickers that are transferred from Container D to Container E
= Number of stickers in Container D at first - Number of stickers in Container D in the end
= 80 - 45
= 35

Answer(s): 35