Click here for a PowerPoint presentation on solving systems of linear equations.
After thoroughly reviewing the examples in the PowerPoint presentation, go through these two introductory tutorials below:
The Hofstra webpage has a good tutorial on systems of linear equations. You can skip portions that discuss matrices and matrix algebra, as you won't be required to know this. Their applications of linear equations section is also worth looking at.
Warner, S. & Costenoble, S.R. (2000). 2.1 Systems of Two Linear Equations in Two Unknowns. Finite Mathematics and Applied Calculus. Retrieved May 20, 2009, from: http://people.hofstra.edu/faculty/Stefan_Waner/RealWorld/tutorialsf1/fr ames2_1.html
The ThinkQuest Library has a Page on Systems of Equations that is worth going through.
Here is a good site that discusses solving systems of linear equations.
Stapel, E. (2004). Systems of linear equations. Purple Math Practical Algebra Lessons. Retrieved May 20, 2009, from: http://www.purplemath.com/modules/systlin1.htm
These following two links below are good for reviewing some of the basic formulas:
This page from S.O.S. Math on Systems of Equations in Two Variables is a good overview.
Marcus, N. (n.d.) Systems of equations. S.O.S. Mathematics Algebra. Retrieved May 20, 2009, from: http://www.sosmath.com/soe/SE/SE.html
Marcus, N. (n.d.) Systems of equations in Two Variables. S.O.S. Mathematics Algebra. Retrieved May 20, 2009, from: http://www.sosmath.com/soe/SE2001/SE2001.html
Visit the below web site review the tutorial on solving systems of linear equations in three variables. Pay particular attention to how consistent and inconsistent systems are defined.
Seward, K. (2002). College Algebra Tutorial 50: Solving Systems of Linear Equations in Three Variables. Accessed May 20, 2009, at: http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col _alg_tut50_systhree.htm.
For three equations with three variable see here
Mathpower.com has a good collection of tutorials prepared by students for students for a variety of topics. So if your professor's explanations are not clear to you, maybe these tutorials will be clear to you. There are a number of tutorials on solving systems of equations at the bottom of this page.
Math.com has a lot of useful background material for those of you who wish to refresh your basic math skills such as fractions, percents, etc.
Warner, S. & Costenoble, S.R. (1998). Regression: Fitting functions to data. Calculus Applied to the Real World. Retrieved May 20, 2009, from: http://people.hofstra.edu/faculty/Stefan_Waner/calctopic1/regression.ht ml
Jenny is responsible for buying a week's supply of food and medication for the dogs and cats at a local shelter. The food and medication for each dog ...
The solution provides a detailed example and instructions on how to set up the system of linear equations.