Simultaneous Equations by Substitution | Algebra | Maths | FuseSchool

CREDITS Animation & Design: Waldi Apollis Narration: Lucy Billings Script: Lucy Billings Click here to see more videos: In this video, we are going to discover how to solve simultaneous equations by substitution. Simultaneous equations are two or more equations with two or more unknowns. They are called simultaneous because they must be solved at the same time. Elimination doesn’t always work…whereas substitution does - so we’ll learn how to substitute in this video. When we solve simultaneous equations, we may get one solution…Or if a quadratic is involved, we may get two solutions…And we might also get 2 solutions with a straight line and a circle... Before we start, we need to know what linear equations look like…They are equations with an ‘x’ and a ‘y’ in, or an ‘a’ and ‘b’, but no squared or cubed letters. Take your time with the algebra, and always double check your answer at the end. Substitution will always work, whereas elimination won’t always. Which is why some people choose to use substitution for any simultaneous equations, even if they are easy linear ones. VISIT us at, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you. These videos can be used in a flipped classroom model or as a revision aid. Twitter: This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC ( View License Deed: ). You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us:

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