Writing Linear Equations Crossword Puzzle

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Across
  1. 2. Question #17
  2. 5. Question #8
  3. 7. Question #14
  4. 9. Question #2
  5. 10. Question #11
  6. 11. Question #10
  7. 12. Question #16
  8. 13. Question #1
  9. 16. Question #20
  10. 18. Question #4
  11. 19. Question #18
Down
  1. 1. Question #9
  2. 3. Question #13
  3. 4. Question #6
  4. 6. Question #7
  5. 8. Question #3
  6. 9. Question #15
  7. 14. Question #19
  8. 15. Question #12
  9. 17. Question #5