You are looking for the length of one side of a square garden.
In this case its a square garden so the answer stays the same for each side.
Step 1: Find out the dimensions.
Step 2: Set up an equation. Since its a square it has 4 sides and we are trying to find the dimensions, so you will take 4x and it has to equal 36.
4x=36
Step 3: Now you will solve. Divide by four on each side and you will get x=9.
So the length of one side of the garden is 9.