Systems of equations are concepts that first show up in Algebra I. Systems of equations are problems with two or more equations that contain the same variables. There are four methods to solving systems of equations: graphing, substitution, elimination and matrices.
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APA style
Introduction to Systems of Equations. (2010, October 18). In ClassBrain Math . Retrieved 00:37, February 8, 2012, from http://www.classbrainmath.com/2010/03/introduction-to-systems-of-equations/
MLA style
Cynthia Kirkeby, “Introduction to Systems of Equations.” ClassBrain Math . 18 October 2010, 05:45 UTC. . 8 Feb 2012 <http://www.classbrainmath.com/2010/03/introduction-to-systems-of-equations/ >.
MHRA style
Cynthia Kirkeby, 'Introduction to Systems of Equations', ClassBrain Math , 18 October 2010, 05:45 UTC, <http://www.classbrainmath.com/2010/03/introduction-to-systems-of-equations/ > [accessed 8 February 2012]
The Chicago Manual of Style
Cynthia Kirkeby, “Introduction to Systems of Equations.” ClassBrain Math , http://www.classbrainmath.com/2010/03/introduction-to-systems-of-equations/ [accessed February 8, 2012].
CBE/CSE style
Cynthia Kirkeby, Introduction to Systems of Equations [Internet]. ClassBrain Math; 2010 October 18, 05:45 UTC [cited 2012 Feb 8]. Available from: http://www.classbrainmath.com/2010/03/introduction-to-systems-of-equations/ .
Bluebook style
Introduction to Systems of Equations, http://www.classbrainmath.com/2010/03/introduction-to-systems-of-equations/ (last visited Feb. 8, 2012).
AMA style
Cynthia Kirkeby, Introduction to Systems of Equations. ClassBrain Math. October 18, 2010, 05:45 UTC. Available at: http://www.classbrainmath.com/2010/03/introduction-to-systems-of-equations/ . Accessed February 8, 2012.