Question 851637
The formula for finding the perimeter of a pentagon is 5x = Perimeter, where x is the length of each side.  So, in order to solve, we need to set up as an equation:


5x = 10x - 25


Since we need to get x by itself on one side of the equation, we can first subtract 10x from both sides, giving us


-5x = -25


Finally, divide both sides of the equation by -5, which will give us x (the sides of the pentagon):


x = 5


Therefore, the length of one side of the pentagon is 5.