Equations

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Across
  1. 5. NEGATIVE
  2. 6. POSITIVE
  3. 9. EXPRESSION
  4. 12. ADD
  5. 14. MULTIPLY
  6. 15. SUBTRACT
  7. 18. EQUATION
Down
  1. 1. LINEAR
  2. 2. REPLACE
  3. 3. DIVIDE
  4. 4. SOLUTION
  5. 7. DENOMINATOR
  6. 8. VARIABLE
  7. 10. SUBSTITUTE
  8. 11. BALANCE
  9. 13. BRACKETS
  10. 16. UNKNOWN
  11. 17. TERM