SAT Math Multiple Choice Question 19: Answer and Explanation
5. How many solutions exist to the equation |x| = |2x - 1| ?
- A. 0
- B. 1
- C. 2
- D. 3
Correct Answer: C
C If |x| = |2x - 1|, either x = 2x - 1 or -x = 2x - 1. The solutions to these equations are 1 and , respectively. However, the only thing you need to recognize is that the equation has two different solutions to establish that the answer is (C).