systems of equations
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i love how this shows exactly what my math teacher is teaching me tomorrow..
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okay. soo.. what about the 40???
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@simplayaj thanks
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@Johnnylightning93 add 15 to both sides
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I'll agreed. These video really helpful
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thanks i'm from Mexico but in my country doesn't explain like you :D sorry for my bad english (Y)
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would like to see this remade with colors etc.
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In the last example you have multiplied the first equation with 4 to get -36y and 36y and you've got: -12x -36y = 264. Now, i just noticed that if you multiplied it with 7 instead to get -21x and 21 x, you would have gotten: -21x - 63y =462 and i couldn't help but notice the cool inversion of digits. How do you explain that?
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Made perfect sense after first question. Really, thanks a lot!
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I would usually understand your videos but this was the worst.
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Mr. Khan could you make a video on how to solve a 3 variable system?
DeViLiN888 2 years ago 34
A teacher told me I'm a hopeless case and would never work "beyond a sixth grade Math level."
Well, my stubbornness refused to believe that would happen b/c of a drunk driver hitting my car headfirst (which is how I got the left-side traumatic brain injury), and I found Khan Academy through my obstinate search for evidence to defy her.
I never knew I'd actually find it, but I did, and I wish I could find her and tell her so. Even better, show her.
vickiormindyb 1 year ago 16