The length of the fencing corresponds to the length of the perimeter of the garden:

We also know that the perimeter of a circle is given by:

where r is the radius of the circle.
Putting together the two equations, we have

from which we can find r, the radius of the garden:
Answer:
g = 136
Step-by-step explanation:
g + 24 = 160 is your equation. then you subtract 24 to each side and get
g = 136.