System of Equations

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Across
  1. 3. Rules describing the sequence to use in evaluating expressions (3 words)
  2. 5. a statement that two mathematical expressions are equal
  3. 6. Method of solving a system in which two equations are added together in a manner that will eliminate one of the two variables. (2 words)
Down
  1. 1. two or more related linear equations (3 words)
  2. 2. a group pf numbers, symbols and variables that express an operation
  3. 4. any value for a variable that makes an inquation or inequality true