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Across
  1. 3. 20+22-46=x
  2. 6. x/10=9
  3. 8. 2-3=x
  4. 10. 64/x=2
  5. 11. 42-7/5
Down
  1. 1. -2x5=x
  2. 2. 2x=-10
  3. 4. 2x=20
  4. 5. 9x8+9=x
  5. 7. 5x10+9=x
  6. 9. 44/4=x
  7. 11. 3+3-3(2)=x