Appendix A - A.1 - Algebraic Expressions - Exercises - Page 540: 1a

a) Reflexive b) Transitive c) Substitution d) Symmetric

a) Any number equals itself. b) If the first number equals the second number and if the second number equls a third number, then the first number equals the third number. c) If one numerical expression equals a second, then it may replace the second. d) Two equal number are equal in either order.