Activity
Lawrence Hall of Science

The Math Page: Skill in Algebra: Simultaneous Linear Equations

For Students 9th - 10th Standards
Here is a site that clearly and thoroughly explains how to solve systems of linear equations using the methods of combination, substitution, and Cramer's Rule. There are example problems solved, problems for the student to attempt, and...
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Systems Using Substitution

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] This lesson covers solving a system of linear equations using substitution.
Activity
Math Medics

S.o.s. Math: Algebra

For Students 9th - 10th Standards
This lesson provides basic instruction on the major concepts in algebra. Content includes a focus on fractions, units of conversion, complex numbers, quadratic equations, factorization and roots of polynomials, solving equations, systems...
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Solving Linear Systems Using Matrices and Technology

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] This lesson covers using a graphing calculator and matrices to solve a system of equations.
Activity
Help Algebra

Help algebra.com: Addition Method to Solve Systems

For Students 9th - 10th Standards
Also known as the Elimination Method, the Addition Method is used in solving several systems of equations. This step-by-step demonstration is a helpful resource to use when learning about solving systems.
Activity
Help Algebra

Help algebra.com: Substitution Method for Systems

For Students 9th - 10th Standards
Using the Substitution Method, a system of equations is solved. The process is shown in detail and can be used as a reference for solving other systems
Handout
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Solving Systems of Linear Equations

For Students 9th - 10th Standards
Find a quick, concise explanation of how to solve systems of linear equations algebraically and graphically. Examples are given and clearly explained.
Handout
Varsity Tutors

Varsity Tutors: Hotmath: Solving Systems of Linear Equations Using Matrices

For Students 9th - 10th Standards
Find a concise explanation of how to solve systems of linear equations using matrices. An example is given and clearly explained.
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Solving Systems of Linear Equations Algebraically

For Students 9th - 10th Standards
Twenty-seven problems present a variety of practice solving systems of linear equations algebraically. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the...
Website
Other

Algebra.com: Linear Equation and System Solvers

For Students 9th - 10th Standards
Linear equations can be solved and graphed using this interactive site. This site allows the user to enter any linear equation in standard form and the y-intercept will be found through a step-by-step process. Systems of inequalities can...
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Graphing Systems of Inequalities

For Students 9th - 10th Standards
Nineteen problems present a variety of practice solving linear systems by graphing systems of inequalities. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click...
Activity
Interactive Mathematics

Interactive Mathematics: Graphical Solution of Non Linear Systems

For Students 9th - 10th Standards
Using the graphing method, several systems of nonlinear equations are solved. Follow each example step by step to see how solutions are derived.
Activity
Purple Math

Purplemath: Cramer's Rule

For Students 9th - 10th Standards
Cramer's Rule for solving a system of equations is presented here using an example of a system in three variables with three equations. The "everything," approach of solving for all three variables is shown as well as the "selective,"...
Unit Plan
Khan Academy

Khan: Lesson 5: Relationships Among Linear Equations, Lines in Coordinate Plane

For Students 9th - 10th Standards
This lesson focuses on the relationship between algebraic, graphical, and contextual expressions of linear equations.
Activity
Interactive Mathematics

Interactive Mathematics: Graphical Solutions of a System

For Students 9th - 10th Standards
An example of how to find the solution of a linear system is presented using the graphing method. This is a nice tutorial for students to use as a reference while practicing with linear systems.
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Graphs of Linear Systems

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] Students learn to solve linear systems by graphing. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.
Activity
University of Georgia

University of Georgia: Slope of Lines

For Teachers 9th - 10th Standards
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.
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Systems Using Substitution

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] This lesson covers solving a system of linear equations using substitution.
Unit Plan
Oswego City School District

Regents Exam Prep Center: Linear Quadratic Systems

For Students 9th - 10th Standards
The mathematics tutorial explores how to solve linear and quadratic systems of equations. The lesson consists of class notes, calculator tips, examples, and practice problems with solutions. The teacher resource includes a worksheet that...
Activity
Lawrence Hall of Science

The Math Page: Skill in Algebra: Word Problems That Lead to Simultaneous Equations

For Students 9th - 10th
Here is a site that clearly and thoroughly explains how to solve word problems that lead to systems of equations, such as mixture, coin, investment, and upstream/downstream problems. There are example problems solved, problems for the...
Handout
Khan Academy

Khan Academy: Elimination Method Review (Systems of Linear Equations)

For Students 7th - 8th Standards
Explains how to use elimination to simplify and solve systems of linear equations. Includes practice problems and explanations of their solutions.
Unit Plan
CK-12 Foundation

Ck 12: Problem Solving Models

For Students 9th - 10th
[Free Registration/Login Required] Students explore using systems of equations by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more about the...
Unit Plan
Khan Academy

Khan Academy: Number of Solutions to Equations Challenge

For Students 7th - 8th Standards
Given a linear equation with missing values, determine appropriate values in order to have one, zero, or infinite solutions. For example, complete the equation -11x + 4 = __x + __ so that it has no solutions. Students receive immediate...
Activity
Other

Simon Fraser University: Background for Linear Systems

For Students 9th - 10th
This site from the Simon Fraser University gives an introduction to solving a system of differential equations.