- #1
The_ArtofScience
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Homework Statement
I'm having trouble with these very strange (and deceptive-looking) systems of linear equations that I would like to know more about. Here they are:
(1) A+C=0
B-2C=4
-A+B+C=0
(2) 3x+y= 1
x-3y=17
The Attempt at a Solution
(1) Using algebra the solutions to the first are C=-1, B=2, A=1. When I did the Gauss method it failed. I've tried thinking of ways to make it work but it just won't come to me.
(2) Algebra gives x=2 and y=-5
This is how my Gauss method turned out:
a) 1/3 R1
b) R1 -1/9 R2 =R1 giving 8/9, 0, -14/9
c) 9/8R1 giving 1, 0, -7/4
d) -1/3R2 giving -1/3, 1, -17/3
e) R2 +1/3R1
but I get -7/4 and -25/4 (?)