I need help finding the answer with step by step

x= -1

Step-by-step explanation:

if

f(x) = -x-3

and

f(x) = -2

than

-x-3 = -2; add 3 to both sides

-x-3+3 = -2+3

-x = 1 ; multiply both sides by -1

x= -1

the furthest the dog can be is 508 meters away from the house, and the closest he can be is 492 meters away from the house.