Questions on Algebra: Introduction to vectors, addition and scaling answered by real tutors!

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Question 72029: What are the four properties of equality: What are the four properties of equality
Answer by vleith(1174) About Me  (Show Source):
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Reflexive a=a
Symmetric If a=b, then b=a
Transitive If a=b and b=c, then a=c
Substitution If a=b, a may replace b in any equation