At the school, Storey J and Storey K had an equal number of desks at first. If 7 desks were removed from Storey K and 5 times as many desks were removed from Storey J as Storey K, the number of desks in Storey K would be 5 times as many as in Storey J. Find the number of desks on each storey.

	Storey J	Storey K
Before	1 u	1 u
Change	- 35	- 7
After	1 u - 35	1 u - 7

Number of desks removed from Storey J
= 5 x 7
= 35

Number of desks on Storey J and Storey K at first is the same.

Number of desks on Storey K is 5 times as many as Storey J in the end. If the number of desks on Storey J increases by 5 times, the number of desks on Storey J and Storey K will be the same.

5(1 u - 35) = 1 u - 7
5 u - 175 = 1 u - 7 
5 u - 1 u = 175 - 7
4 u = 168

1 u = 168 ÷ 4 = 42

Number of desks in each floor
= 1 u
= 42

Answer(s): 42