Answer:
Explanation:
x = 10, y = 9 (the diagram woefully misrepresents the actual shape of the garden)
Anyway, 10 ft. will be needed for each of two longer sides of the garden, e.g. 20 ft.
By the same token, the two shorter perimeters total 18 ft.
Therefore, 38 ft. of fencing will be needed.
If you need an explanation for why y is 9 and x is 10, it's because of the 2 ft. of walkway on each side.