Posted by **barbie** on Friday, October 28, 2011 at 7:51pm.

x + y = 4 , x + z = 4, y + z = 4

- math -
**Reiny**, Friday, October 28, 2011 at 8:17pm
1st - 2nd: y-z=0

y = z

2nd - 3rd: x-y=0

x = y

so x = y = z

so from 1st : 2x = 4

x = 2

so x = y = z = 2

- math -
**bobpursley**, Friday, October 28, 2011 at 8:19pm
x+y + 0z=4

x+0y+z=4

0x+y+z=4

1,1,0,4

1,0,1,4

0,1,1,4

http://www.gregthatcher.net//Mathematics/GaussJordan.aspx

all variables are equal to 2

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