The Elimination Method
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Description The Elimination Method
After this lesson, you will be able to solve systems of equations by elimination.
The lesson begins by teaching you that the goal of this method is to eliminate one of the variables first. It leads you to learn how to change or manipulate the equations before you can add them together to eliminate that variable. It concludes by showing you how to then solve for the eliminated variable to get the solution.
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This video includes key concepts, notation, and vocabulary such as whole number constant, which is the number we multiply an equation by to change or manipulate it to get the additive inverse required to eliminate a variable.
Before watching this video, you should already be familiar with the distributive property, additive inverses, the least common multiple, and opposite operations.
After watching this video, you will be prepared to identify real-world situations that may require finding a common point of intersection between two equations and solve them using elimination.
Common Core Standard(s) in focus: 8.EE.C.8 A video intended for math students in the 8th grade Recommended for students who are 13 - 14 years old