Simultaneous Equations

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Across
  1. 5. EXPRESSION
  2. 7. LINEAR
  3. 10. BALANCE
  4. 11. COEFFICIENT
Down
  1. 1. VARIABLE
  2. 2. SOLUTION
  3. 3. EQUATION
  4. 4. TERM
  5. 6. SIMULTANEOUS
  6. 8. OPERATION
  7. 9. UNKNOWN