Answer:
8.65 miles
Step-by-step explanation:
let his long run be x
given: total training goal = 18 miles
3 short runs = 9.35 miles
total training goal = long run + 3 short runs
18 = x + 9.35 (rearrange)
x + 9.35 = 18 (subtract 9.35 from each side)
x = 18 - 9.35
x = 8.65 miles
