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 Pair of Linear Equations and Quadratic Equations https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-elimination/v/solving-systems-of-equations-by-multiplication 2021-05-24T11:10:24Z Systems of equations with elimination (and manipulation) In some cases, we need to slightly manipulate a system of equations before we can solve it using the elimination method. See how it's done in this video. Sal Khan video https://cdn.kastatic.org/googleusercontent/8fSMiND4KoKRtNsTeuNYD3FNP5jjdekKoO6VEN3OYxMZXYCyDO4Mt-TrR7tmWEco3yi9_9rFgkM_27-e2vEw7aEl Systems of equations with elimination (and manipulation) In some cases, we need to slightly manipulate a system of equations before we can solve it using the elimination method. See how it's done in this video. https://cdn.kastatic.org/ka-youtube-converted/wYrxKGt_bLg.mp4/wYrxKGt_bLg.mp4 721 Pair of Linear Equations and Quadratic Equations https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:systems-of-equations-word-problems/v/ex-3-age-word-problem 2021-02-07T17:14:00Z Age word problem: Ben & William Sal solves the following age word problem: William is 4 times as old as Ben. 12 years ago, William was 7 times as old as Ben. How old is Ben now? Sal Khan video https://cdn.kastatic.org/googleusercontent/MYxSSU8heK6Iaq5yk3WIQnTwkQH8-mgmfDvEfccpVxxi64tlo3JlSbEBenA7tRVzuhBr8aJqtOH3V3S4MGjUUJQJ Age word problem: Ben & William Sal solves the following age word problem: William is 4 times as old as Ben. 12 years ago, William was 7 times as old as Ben. How old is Ben now? https://cdn.kastatic.org/ka-youtube-converted/RGbA2IyJILY.mp4/RGbA2IyJILY.mp4 388 Pair of Linear Equations and Quadratic Equations https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:systems-of-equations-word-problems/v/system-of-equations-distances-word-problem 2022-10-06T11:39:29.972393653Z System of equations word problem: walk & ride Systems of equations can be used to solve many real-world problems. In this video, we solve a problem about distances walking and riding bus to school. video https://cdn.kastatic.org/ka_thumbnails_cache/297bb556-9656-47e8-814c-cb10e3239ad5_1280_720_base.png System of equations word problem: walk & ride Systems of equations can be used to solve many real-world problems. In this video, we solve a problem about distances walking and riding bus to school. https://cdn.kastatic.org/ka-youtube-converted/Q0tTfe2lKIc.mp4/Q0tTfe2lKIc.mp4 420 Pair of Linear Equations and Quadratic Equations https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratic-functions-equations/x2f8bb11595b61c86:quadratics-solve-factoring/v/example-3-solving-a-quadratic-equation-by-factoring 2020-12-28T16:56:57Z Quadratic equations word problem: box dimensions Sal solves a volume problem using a quadratic equation. Sal Khan video https://cdn.kastatic.org/googleusercontent/XGrHwULNcJVK8APd4wYT6nVpA-q2mxhM9C9QtNQYpuguJ9tn9kwoDaVpBmtq8fVK8Dqbfd5HTYIVSgHoX5xMGc2s Quadratic equations word problem: box dimensions Sal solves a volume problem using a quadratic equation. https://cdn.kastatic.org/ka-youtube-converted/vl9o9XEfXtw.mp4/vl9o9XEfXtw.mp4 354 Pair of Linear Equations and Quadratic Equations https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratic-functions-equations/x2f8bb11595b61c86:quadratics-solve-factoring/v/solving-quadratics-by-dividing-and-factoring 2022-10-06T23:01:00.745424633Z Solving quadratics by factoring: leading coefficient ≠ 1 Sal solves 6x²-120x+600=0 by first dividing by 6 and then factoring. video https://cdn.kastatic.org/ka_thumbnails_cache/43007ffc-6270-47a0-a5c7-3642cb32dcda_1280_720_base.png Solving quadratics by factoring: leading coefficient ≠ 1 Sal solves 6x²-120x+600=0 by first dividing by 6 and then factoring. https://cdn.kastatic.org/ka-youtube-converted/KbFwLvCOBUI.mp4/KbFwLvCOBUI.mp4 275 Pair of Linear Equations and Quadratic Equations https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratic-functions-equations/x2f8bb11595b61c86:standard-form-quadratic/v/application-problem-with-quadratic-formula 2021-06-30T17:32:38Z Quadratic word problem: ball Sal solves a word problem about a ball being shot in the air. The equation for the height of the ball as a function of time is quadratic. Sal Khan video https://cdn.kastatic.org/googleusercontent/dvyWuNQ8WzVeTAUzYpi9a4ZcD4dvdto9umYIzFqnduWfAOekC-W154fwNxUj9yGJzcgbX1qd08x2RY3KGj4AmPSH Quadratic word problem: ball Sal solves a word problem about a ball being shot in the air. The equation for the height of the ball as a function of time is quadratic. https://cdn.kastatic.org/ka-youtube-converted/OZtqz_xw0SQ.mp4/OZtqz_xw0SQ.mp4 353 Pair of Linear Equations and Quadratic Equations https://www.khanacademy.org/math/revision-up-math-class-8/xe4edb0d90ad0a387:week-2-revision-up-math-class-8/xe4edb0d90ad0a387:pair-of-linear-equations-revision-up-math-class-8/e/revision-pair-of-linear-equations-up-math-class-8 2025-01-28T11:26:50.117543146Z Revision Pair of Linear Equations and Quadratic Equations Practice Problems for revision of Pair of Linear Equations and Quadratic Equations. Satya Swaroop exercise