1.5
yes, both give same result (12), do the same to the top and bottom (divide or multiply) and the result is the same.
When you add 12 to itself, you get 24. Dividing 24 in half gives you 12. Therefore, 12 added to itself and then divided in half results in 12.
13.5
12
0.3333
The quotient is 24.
24
12/3.5 = 3.428571 recurring (that is, 3.428571428571...)
-6
0.0556
40
There is no way to divide 12 in half and get 7 as the result. Dividing 12 in half would give you 6.