Properties of Equality

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Across
  1. 2. if x = y and y = z, then x = z
  2. 5. if x = y, then y = x
  3. 6. if x = y, then x/z = y/z
  4. 7. if x = y, then x*z = y*z
Down
  1. 1. if x = y, then x + z = y + z
  2. 3. x = x
  3. 4. if x = y, then x - z = y - z
  4. 5. if x = y and x = z, then y = z (replacement)