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YoshiOokami
Group Title
how to solve linear equation with three variables
x + y + z = 5
2x  y + z = 1
x  2y  z= 0
 one year ago
 one year ago
YoshiOokami Group Title
how to solve linear equation with three variables x + y + z = 5 2x  y + z = 1 x  2y  z= 0
 one year ago
 one year ago

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precal Group TitleBest ResponseYou've already chosen the best response.0
easy get rid of your Z variables first add 1st equation to your 3rd equation then add 2nd equation to your 3rd equation this way you have 2 equations with x and y solve them like you would a regular x and y system Once you know x or y sub it into 2 of your equations, maybe 2nd and 3rd and solve for the remaining variables.
 one year ago

ashdash Group TitleBest ResponseYou've already chosen the best response.1
you could do a matrix on your calculator too :)
 one year ago

richyw Group TitleBest ResponseYou've already chosen the best response.0
I just tried to explain this to someone and it took me like half an hour haha. I highly recommend watching this video. http://www.youtube.com/watch?v=woqq3Sls1d8 your options are 1)substitution 2)subtraction/elimination 3)row reducing an augmented matrix. I guess method 2 and 3 are the same thing. for a small system of equations I would use method 1, for a large one I could use method 3.
 one year ago

precal Group TitleBest ResponseYou've already chosen the best response.0
yes the matrix feature on the TI84 or TI83 is real easy to use
 one year ago
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