Answer:
s = k- 13 or s + k = 13
s: distance between Hadley and Greenville
k: distance between Parker and Greenville
Explanation:
Let us assume the distance between Parker and Greenville = k miles
Also, assume that the distance between Hadley and Greenville = s miles
Now as given:
The difference between Hadley and Greenville is 13 miles less than the distance between Parker and Greenville.
⇒ The difference between Hadley and Greenville
= the distance between Parker and Greenville. - 13
or, s = k- 13 is the NEEDED equation.
or, s + k = 13