No is your answer
Assuming that b ≠ a, the answers will not be the same.
For example, (remembering that b ≠ a) let us assume that b = 10, a = 5
10 - 5 = 5
5 - 10 = -5
5 ≠ -5
So the commutative property of subtraction does not work unless in certain cases, in which a = b.
hope this helps
6/9 (2/3) and 2/3. Hope this helps you.
Correct the answer is -55
19 feet
convert 2
into an improper fraction
2
= 
hence the length of the wall is 19 feet