https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/the-substitution-method 2023-05-12T21:01:01.897246564Z Systems of equations with substitution: 2y=x+7 & x=y-4 When solving a system of equations using substitution, you can isolate one variable and substitute it with an expression from another equation. This will allow you to solve for one variable, which you can then use to solve for the other. Sal Khan video https://cdn.kastatic.org/googleusercontent/baHMoKef-ogNFJ-sWgFBiJdyb_ouP6b8DA65uUie120OvuJlqupT7EgPmnlQfigT48uqx4Z5eGsuO6xZV3aG6fk Systems of equations with substitution: 2y=x+7 & x=y-4 When solving a system of equations using substitution, you can isolate one variable and substitute it with an expression from another equation. This will allow you to solve for one variable, which you can then use to solve for the other. https://cdn.kastatic.org/ka-youtube-converted/uzyd_mIJaoc.mp4/uzyd_mIJaoc.mp4 279 Systems of equations with substitution https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/systems-of-equations-with-substitution 2021-06-21T15:29:13Z Systems of equations with substitution Walk through examples of solving systems of equations with substitution. article https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-2 2021-06-21T15:29:13Z Systems of equations with substitution: y=4x-17.5 & y+2x=6.5 Learn to solve the system of equations y = 4x - 17.5 and y + 2x = 6.5 using substitution. Sal Khan video https://cdn.kastatic.org/googleusercontent/B1x30i63cqzh1YieGKTgDfbpeHUKvhPmIfsmbgCZstjQs_KG5Kn-nuBpy6oCsQ3k7DvJ4Arrjap-jX5D2_ZAeYuJ Systems of equations with substitution: y=4x-17.5 & y+2x=6.5 Learn to solve the system of equations y = 4x - 17.5 and y + 2x = 6.5 using substitution. https://cdn.kastatic.org/ka-youtube-converted/wB3QCk0MGuw.mp4/wB3QCk0MGuw.mp4 246 Systems of equations with substitution https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems 2021-06-21T15:29:06Z Systems of equations with substitution: -3x-4y=-2 & y=2x-5 Learn to solve the system of equations -3x - 4y = -2 and y = 2x - 5 using substitution. Sal Khan video https://cdn.kastatic.org/googleusercontent/628RjCJ_CsSqK0HqbIq8aNzgQ257wowuvmMVKKnUJmO9mpgtI2jeA2M8Zz15za_g4gB2lK1zv-A2gIIc8JNmvrKv Systems of equations with substitution: -3x-4y=-2 & y=2x-5 Learn to solve the system of equations -3x - 4y = -2 and y = 2x - 5 using substitution. https://cdn.kastatic.org/ka-youtube-converted/GWZKz4F9hWM.mp4/GWZKz4F9hWM.mp4 261 Systems of equations with substitution https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-3 2021-06-21T15:29:10Z Systems of equations with substitution: 9x+3y=15 & y-x=5 Learn to solve the system of equations 9x + 3y = 15 and y - x = 5 using substitution. Sal Khan video https://cdn.kastatic.org/googleusercontent/bjP0YUSguKZ4ydkR-05lY2SFTE0zKYhnOV3tUWIukcLprjjA5vR9ngfLnBpp1Myuh6EPOZhCdmeSeqqXAw2FztpiUQ Systems of equations with substitution: 9x+3y=15 & y-x=5 Learn to solve the system of equations 9x + 3y = 15 and y - x = 5 using substitution. https://cdn.kastatic.org/ka-youtube-converted/0BgUKHTW37E.mp4/0BgUKHTW37E.mp4 364 Systems of equations with substitution https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution 2025-12-28T12:11:43.202987517Z Systems of equations with substitution Solve systems of equations where one of the equations is solved for one of the variables. Tomer Gal exercise https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/substitution-method-2 2021-06-21T15:29:05Z Systems of equations with substitution: y=-5x+8 & 10x+2y=-2 Learn to solve the system of equations y = -5x + 8 and 10x + 2y = -2 using substitution. Sal Khan video https://cdn.kastatic.org/googleusercontent/LZKtq5MQExOWTJXDoMBcJn0mY03904EYUmFSWR4JYpFGDxtpRWCpmKu-W8-1AKi2OzWeS-kr7Nf9IJ-FB90tQLG3 Systems of equations with substitution: y=-5x+8 & 10x+2y=-2 Learn to solve the system of equations y = -5x + 8 and 10x + 2y = -2 using substitution. https://cdn.kastatic.org/ka-youtube-converted/2VeqrZ_PMiY.mp4/2VeqrZ_PMiY.mp4 224 Systems of equations with substitution https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-1 2021-06-21T15:29:13Z Systems of equations with substitution: y=-1/4x+100 & y=-1/4x+120 Learn to solve the system of equations y = -1/4x + 100 and y = -1/4x + 120 using substitution.  Sal Khan video https://cdn.kastatic.org/googleusercontent/8-jmKFKC4W-USw99eCrcqS8GVQH0BYgXx7b3keFeuoabTCfTSXewomJGrXVQ2PdfCIPA7TaEcBxex1eHQuAxnNA7 Systems of equations with substitution: y=-1/4x+100 & y=-1/4x+120 Learn to solve the system of equations y = -1/4x + 100 and y = -1/4x + 120 using substitution.  https://cdn.kastatic.org/ka-youtube-converted/HJV_HY0Sh0s.mp4/HJV_HY0Sh0s.mp4 224 Systems of equations with substitution https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations 2021-06-21T15:29:14Z Substitution method review (systems of equations) 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. article