The Substitution Method | Systems Of Equations | 8th Grade | Khan Academy

The Substitution Method

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8th grade on Khan Academy: 8th grade is all about tackling the meat of algebra and getting exposure to some of the foundational concepts in geometry. If you get this stuff (and you should because you’re incredibly persistent), the rest of your life will be easy. Okay, maybe not your whole life, but at least your mathematical life. Seriously, if you really get the equations and functions stuff we cover here, most of high school will feel intuitive, even relaxing. (Content was selected for this grade level based on a typical curriculum in the United States.)

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20 thoughts

  1. this didn’t help that much, you should add different types of problem to give the viewers a clue of how to solve them in my opinion

  2. When your teacher doesn’t even teach you for your exam and tells you to go on videos instead

  3. When your teacher doesn’t even teach you for your exam and tells you to go on videos instead

  4. Nobody told me I could just -x when theres 2x I always tried to devide by 2 this makes my life 100% simpler

  5. if you get rid of the “y” at the end of the problem solving then you do NOT get y = 3; you get 2 = 3. That makes absolutely no sense. if you get rid of y, you have to bring down the 2.

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