Properties of Equality (Enginerds)

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Across
  1. 4. if x=y, then xz=yz
  2. 5. if x=y, then y=x
  3. 7. if x=y, then x+z = y+z
  4. 8. It means if x=y and y=z, the x=z
Down
  1. 1. It means x=x
  2. 2. if x=y, then y can be substituted for x
  3. 3. if x=y, then x-z = y-z
  4. 6. if x=y, then x/z = y/z