# Guassian elimination to solve system

• Mar 23rd 2009, 08:06 PM
Såxon
Guassian elimination to solve system
2x+3y-z=4 converting this into an augmented matrix and into echelon form
4x-2y+3z=-7
-6x+7y-7y=3
=
[1 1.5 -.5 2]
[0 1 -.8 2.2]
[0 0 1 8.9]

the answer i got was x= -7.5 y=9.3 z= 8.9
anyone care to solve this and check my answer?
many thanks!
• Mar 24th 2009, 02:31 AM
Showcase_22
$4(-7.5)-2(9.3)+3(8.9)=-21.9 \neq -7$