Should would have ran 8.6 KM
Answer:
Trench warfare was a technique used to fight in World War 1. As they could hide/defend there. Get supplie there. They could even have medical areas there, but the problem was a stalemate as that was such a thing that no one attacks and they stay without moving on in the battle.
4 + y = 19
y = 19 - 4
y = 15
The answer is q=15
Hope this helps ya