It's just a number line ... <<<< There must be more than "just" a number line.
From where are you getting the symbols A, E, D, and C?
... so would it be right if I got 2 as my final answer ...Not from the information that you've stated.
... I took -3 - 2 and got -2 ... Subtracting 2 from -3 results in -5, not -2.
... for the bottom i took 0-1 and got -1<<<< The "bottom" of what? A Real number line has no "bottom".
... So I divided ...<<<< I previously told you that there are no divisions in the expression AE - DC.