If we were to try to solve for the first equation, we would end up getting a fraction in either case for x or y. You could still solve for both x and y this way, but it would be more difficult to deal with.

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The substitution method is a technique for solving a system of equations. This article reviews the technique with multiple examples and some practice problems for you to try on your own.

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Example: Picking a non-blue marble Example: Rolling even numbers three times Example: Probability through counting outcomes Example: Picking a yellow marble Introduction to dependent probability …

Learn to solve the system of equations y = 4x - 17.5 and y + 2x = 6.5 using substitution. Created by Sal Khan and Monterey Institute for Technology and Education.

This original Khan Academy video was translated into isiXhosa by Athabile Matshotyana. The translation project was made possible by ClickMaths: www.clickmaths.org

Learn to solve the system of equations -3x - 4y = -2 and y = 2x - 5 using substitution.

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First, I'm just going to solve this the way that I might try to solve it. Let's say we have 5x minus 11 is equal to 42 and as we've seen before whenever I like to solve something, I like to isolate the variable …