Xin uses 20 yards of fencing to build the walls of a square Chicken Coop which equation and solution represents x, the length, in yards, of each wall of the square coop? A:
b:
c:
d:

Equation: or

Solution:

Step-by-step explanation:

The formula that is used to calculate the perimeter of  a square is:

Where "s" is the side lenght the square.

Knowing that Xin used  20 yards of fencing to build the walls of a square chicken coop (in which the lenght in yards of each wall is represented with "x"), you can identify that:

Then, you can susbtitute values into the formula :

Finally, you must solve for "x" in order to find its value.

This is: