document.write( "Question 66229This question is from textbook An Incremental Development
\n" ); document.write( ": please help to solve\r
\n" ); document.write( "\n" ); document.write( "2x - y - z = -5\r
\n" ); document.write( "\n" ); document.write( "-2x + 2y - z = 5\r
\n" ); document.write( "\n" ); document.write( "x + 3y + z = 6
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Algebra.Com's Answer #47094 by venugopalramana(3286)\"\" \"About 
You can put this solution on YOUR website!
F YOU WANT SOLUTION BY ELIMINATION
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\n" ); document.write( "equations with 3 linear
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\n" ); document.write( "6x-4y+5z=31
\n" ); document.write( "5x+2y+2z=13
\n" ); document.write( "x+y+z=2
\n" ); document.write( "should you multiply the 2nd equation by 2?
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\n" ); document.write( "1 solutions
\n" ); document.write( "Answer 29601 by venugopalramana(2734) About Me on
\n" ); document.write( "2006-07-04 11:53:09 (Show Source):
\n" ); document.write( "You can put this solution on YOUR website!
\n" ); document.write( "OK..THE PROBLEM,WE FACE IN ANSWERING IS THAT WE ARE
\n" ); document.write( "NOT AWARE OF YOUR COURSE OF STUDY AND BACKGROUND.THE
\n" ); document.write( "SOLUTION I GAVE IS BY GAUSS JORDAN ELIMINATION METHOD
\n" ); document.write( "USED IN MATRICES AS WANTED BY SOME STUDENTS.IF YOU ARE
\n" ); document.write( "NOT TAUGHT THAT ,WE SHALL DO BY NORMAL ELIMINATION.
\n" ); document.write( "equations with 3 linear variables
\n" ); document.write( "6x-4y+5z=31.......................................I
\n" ); document.write( "5x+2y+2z=13...........................II
\n" ); document.write( "x+y+z=2.......................III
\n" ); document.write( "EQN.II - 2*EQN.III
\n" ); document.write( "5X+2Y+2Z-2X-2Y-2Z=13-2*2=9
\n" ); document.write( "3X=9
\n" ); document.write( "X=9/3=3
\n" ); document.write( "EQN.I+4*EQN.III
\n" ); document.write( "6X-4Y+5Z+4X+4Y+4Z=31+4*2=39
\n" ); document.write( "10X+9Z=39...BUT...X=3..SO
\n" ); document.write( "10*3+9Z=39
\n" ); document.write( "9Z=39-30=9
\n" ); document.write( "Z=9/9=1
\n" ); document.write( "PUTTING IN EQN.III
\n" ); document.write( "3+Y+1=2
\n" ); document.write( "Y=2-4=-2
\n" ); document.write( "HOPE YOU UNDERSTOOD.
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