Solution: If the side length of a square is xcm, the length of the original rectangle is (x+5)cm and the width is (x-2)cm.

(x+5)(x-2)= x？

Tidy up and get an X? +3x- 10=x？

3x= 10

The solution is x= 10/3.

The length of the original rectangle is: x+5= 10/3+5=25/3 (cm),

Width: x-2= 10/3-2=4/3 (cm).

I wish you progress in your study and hope to adopt it.