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Help Algebra
Help algebra.com: Using Principles of Equality
An equation is solved using both the addition and multiplication principles of equality. This example can be used as a model for solving similar equations.
University of Saskatchewan (Canada)
University of Saskatchewan: Inequalities
This University of Saskatchewan looks at the basic rules of solving inequalities, concentrating on inequalities with absolute values. Includes example problems and exercises with their solutions.
Texas A&M University
Wtamu Virtual Math Lab: Intermediate Algebra: Properties of Real Numbers
After finishing this tutorial, you'll be well versed in various properties of real numbers: identity and inverse properties, commutative and associative properties, and distributive properties. You'll also know about the various symbols...