Khan Academy: Systems With Three Variables: Systems of Three Variables

Put all that algebra learning to use! Using algebraic strategies, learners solve three-variable systems. They then use the three-variable systems to write a quadratic equation given three points on the parabola.

Can an equation have an infinite number of solutions? Allow your class to discover the relationship between the input and output variables in a two-variable equation. Class members explore the concept through tables and graphs and...

Sal uses the elimination method to simplify a system of three variables. Next, he employs the substitution method to check his solution. This resource would nicely complement any lesson on this topic.

How does solving a system of three equations compare to solving two-variable equations? The video tutorial shows how to utilize the same methods of substitution and elimination to solve a system of three equations. The instructor solves...

Here is a challenging motion problem about two different length trains and how long it takes them to pass each other going in the same direction and opposite directions. At first glance, there doesnÕt seem to be enough information given...

This lesson video shows how to solve a system of three equations with three unknown.

This video demonstrates how to solve a problem in a geometry context by setting up and solving a systems of equations in three variables.

In this video a quadratic system is given and, in the process of solving algebraically, it is determined that there is no solution. This conclusion is confirmed graphically.

How many different ways can three planes intersect? The interactive provides three movable planes. Pupils manipulate the planes to determine the number of solutions possible based upon their intersections.

Sometimes you'll need to solve an equation with multiple variables on each side. This step-by-step tutorial will show you how to set your equation to 0, factor out the GCF, simplify, write your answers as a set, then plug and chug to...