document.write( "Question 64106This question is from textbook College Algebra with Modeling and Visualization
\n" ); document.write( ": Use Gaussian elimination with backward substitution to solve the system of linear equations. Write the solution as an ordered pair or ordered triple, whenever possible.
\n" ); document.write( "x+2y+z=3
\n" ); document.write( "x+y-z=3
\n" ); document.write( "-x-2y+z=-5 \n" ); document.write( "
Algebra.Com's Answer #46186 by venugopalramana(3286)\"\" \"About 
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Use Gaussian elimination with backward substitution to solve the system of linear equations. Write the solution as an ordered pair or ordered triple, whenever possible.
\n" ); document.write( "x+2y+z=3
\n" ); document.write( "x+y-z=3
\n" ); document.write( "-x-2y+z=-5
\n" ); document.write( "1,2,1,3
\n" ); document.write( "1,1,-1,3
\n" ); document.write( "-1,-2,1,-5
\n" ); document.write( "R2=R2-R1....AND....R3=R3+R1
\n" ); document.write( "1,2,1,3
\n" ); document.write( "0,-1,-2,0
\n" ); document.write( "0,0,2,-2
\n" ); document.write( "R2=-R2.....R3=R3/2
\n" ); document.write( "1,2,1,3
\n" ); document.write( "0,1,2,0
\n" ); document.write( "0,0,1,-1
\n" ); document.write( "R2=R2-2*R3............R1=R1-R3
\n" ); document.write( "1,2,0,4
\n" ); document.write( "0,1,0,2
\n" ); document.write( "0,0,1,-1
\n" ); document.write( "R1=R1-2*R2
\n" ); document.write( "1,0,0,0
\n" ); document.write( "0,1,0,2
\n" ); document.write( "0,0,1,-1
\n" ); document.write( "HENCE X=0.....Y=2..........Z=-1
\n" ); document.write( "(0,2,-1) \n" ); document.write( "
\n" );