University of Georgia
University of Georgia: Slope of Lines
This site provides a detailed unit on finding the slope of lines that investigates methods for solving systems of equations. Good lesson plan for class.
Oak Ridge National Laboratory
Ornl: 7 Gaussian Elimination on Band Matrices
This site gives an example of solving a system of equations with the use of Gaussian Elimination.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Cramer's Rule and Determinant of a Matrix
Sixteen problems present a variety of practice using Cramer's Rule to solve equations and systems of equations and working with the determinant of a matrix. They are given with each step to the solution cleverly revealed one at a time....
Other
Algebra.com: Linear Equation and System Solvers: Solve Linear Systems
This interactive linear system solver allows you to enter two linear equations in general form and then plot the lines and find the answer using either substitution or elimination. The answer is presented with both methods accompanied by...
Purple Math
Purplemath: Systems of Non Linear Equations: Definitions
This Purplemath lesson provides formulas, equations, graphs and explanations of systems of equations.
Math Medics
S.o.s. Math: Application of Determinant to Systems: Cramer's Rule
This lesson explains how the determinant is used for Cramer's Rule.
Purple Math
Purplemath: Systems of Linear Inequalities
This Purplemath lesson describes how to solve a system of linear inequalities by graphing.