D's Negativity

[chaouky]

Is d negative?

(1) e + d = -12

(2) e - d < -12


I clearly get 1. Insufficient and 2. Insufficient

For 1+2 can we write this :

e-d < e+d
so,
-d < d
0 < 2d
0 < d
meaning that d is positive ?

is that possible? I feel like this method is wrong somewhere ...
Any Help ?

Thanks !!

[jnelson0612]

This looks good to me--what is the original answer? I worked it a different way and also got C, since d is positive when combining the two statements.