Entry Exam Category: High School Equivalency Exams
Course: HiSET
Exam: HiSET Math Practice Test

Practice Question

How many solutions does the equation 3x + 9 = 3x - 12 have?

Answer Choices

  • B: 1
  • C: 2
  • D: 3
  • E: Infinitely many

Correct Answer: A

Rationale: Simplify: 3x + 9 = 3x - 12. Subtract 3x: 9 = -12, a contradiction. No solutions. Options: 1, 2, 3, Infinitely many incorrect; 0 correct.

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