>>11795625I was probably making the same mistake that you were at first and getting 5/2, yes? But the X in the numerator is a variable, and not a multiplication sign.
The expression [ 3 x (-1) ]
turns into [3 (-1) (-1) ] by substituting in (-1) for x.
Then 3 times (-1) times (-1) = 3.
So it's (3/2) + 4 = 3/2 + 8/2 = 11/2.
