# Systems of Linear Equations

### Popular Tutorials in Systems of Linear Equations

• #### How Do You Solve a Word Problem Using a System of Inequalities?

Math can sneak up in all sorts of places, so it's important to be prepared! Follow this tutorial to see a real world math problem involving a system of inequalities!

• #### How Do You Solve a System of Equations by Graphing?

There are many different ways to solve a system of linear equations. In this tutorial, you'll see how to solve a system of linear equations by graphing both lines and finding their intersection. Take a look!

• #### How Do You Solve a System of Equations Using the Substitution Method?

There are many different ways to solve a system of linear equations. In this tutorial, you'll see how to solve a system of linear equations by substituting one equation into the other and solving for the variable. Then, see how to use that variable value to find the value of the other variable. Check it out!

• #### How Do You Solve a System of Equations Using the Elimination by Multiplication Method?

There are many different ways to solve a system of linear equations. In this tutorial, you'll see how to solve such a system by combining the equations together in a way so that one of the variables is eliminated. Then, see how find the value of that variable and use it to find the value of the other variable. Take a look!

• #### How Do You Solve a System of Inequalities by Graphing?

There are many different ways to solve a system of inequalities. In this tutorial, you'll see how to solve such a system by graphing both inequalities and finding their intersection. Check it out!

• #### How Can You Tell When a System of Equations Has Infinitely Many Solutions?

A system of linear equations can have one solution, no solution, or infinitely many solutions. That's right, infinitely many solutions! Watch this tutorial to find out how to identify systems that have infinitely many solutions.

• #### How Do You Solve a System of Equations in Three Variables Using Elimination?

The elimination method can be extended from solving a system of equations with two variables to solving a system with three variables. Watch the tutorial to find out how!

• #### How Do You Solve a System of Equations in Three Variables Using Substitution?

The substitution method can be extended from solving a system of equations with two variables to solving a system with three variables. Follow along with the tutorial to see how this is done.

• #### How Do You Solve an Optimization Word Problem?

Optimization problems are used everyday to help businesses figure out how much of their products they need to sell in order to make a profit. Follow along with this tutorial to see a real world problem involving optimization!

• #### What is Linear Programming?

If you want to solve an optimization problem, you can use linear programming to help! This tutorial introduces linear programming and the different pieces of this method.

• #### What is a Matrix?

Matrices can help solve all sorts of problems! This tutorial explains what a matrix is and how to find the dimensions of a matrix.

• #### What Is an Element of a Matrix?

A matrix is a rectangular array of numbers called elements. Watch this tutorial to find out more about the elements of a matrix.

• #### How Do You Find Volumes of Similar Solids?

There's a way to find out the ratio of the volumes of similar solids â€” but it's not as simple as comparing the sides. Watch this tutorial to find out how!

• #### What is the Relationship Between the Surface Areas of Similar Solids?

If you have similar solids, there's a ratio that relates their surface areas. This tutorial uses similar prisms to help you find the ratio rule of the surface areas of any similar solids!