Answer:
-7
Explanation:
If elevator 1 moved up 12 and is now labelled +12, that means we can say that elevator 1 went in the "positive" direction.
Meanwhile, elevator 2 moved down, which is the opposite of up. That means we can say that elevator 2 is moving in the "negative" direction. So since it moved down 7, we can say that it is now at the position labelled "negative 7", which is denoted by -7.
Hope this helps!