Is x a negative number?
(1) 9x > 10x --> rearrange: 0>10x-9x --> 0>x. Sufficient.
(2) x + 3 is positive --> x+3>0 --> x>-3. Not sufficient.
What is unclear for me is not the probelm by itself (I picked the right answer but the first statement
1) 0 > of something then X must be negative
. The answer is definitevely YES.
Instead, I have obtained YES too but X is definetevely positive
. In this scenario is the same, the most imprtant thing is to have a definitive answer, or is wrong thinking in this way??
KUDOS is the good manner to help the entire community.