What is x?
(1) |x| < 2
(2) |x| = 3x – 2
OA B
Not convinced with MGMAT explanation. Someone please explain.
(1) |x| < 2
(2) |x| = 3x – 2
OA B
Not convinced with MGMAT explanation. Someone please explain.
IMO B
A: |x| < 2. It means -2<x<2. Doesn't give us the unique value of x. Insufficient
B: |x| = 3x – 2. Here we have two cases.
Case 1: x>0 => x = 3x-2 => x=1.
Case 2: x<0 => -x = 3x-2 => x=1/2. Since x<0, x can't be 1/2.
So we have only one solution x=1. Sufficient.
Hope this helps
