The Letter X

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Across
  1. 3. Famous copy machine brand that starts with X (5 letters)
  2. 6. Ancient people who used X as the number 10 (6 letters)
  3. 8. A person who studies big questions about life and knowledge (11 letters)
  4. 9. Ancient civilization that gave us the letter X (6 letters)
  5. 10. Not needed; unnecessary (9 letters)
  6. 12. A music style that was rebellious in the 1970s (4 letters)
Down
  1. 1. The Roman counting system using letters like I, V, X (8 letters)
  2. 2. Refusing to obey or follow rules (8 letters)
  3. 4. Fear or hatred of foreigners (10 letters)
  4. 5. Famous tissue brand with X in the name (7 letters
  5. 7. Full of mystery; hard to understand (10 letters)
  6. 11. The 12 followers of Jesus (8 letters)