document.write( "Question 290383: Please help me here, I am lost! Here is the problem: solve the systems of equations without using matrix capabilities of a calculator. I need to show how to work this through:
\n" ); document.write( "3x+y-2z=5
\n" ); document.write( "5x+2y+z=6
\n" ); document.write( "-7x-3y-4z=-7\r
\n" ); document.write( "\n" ); document.write( "Thanks for any help available! It is appreciated! \n" ); document.write( "
Algebra.Com's Answer #210151 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
3x+y-2z=5
\n" ); document.write( "5x+2y+z=6 multiply this equation by 2 & add it to equation #1.
\n" ); document.write( "-7x-3y-4z=-7
\n" ); document.write( "10x+4y+2z=12
\n" ); document.write( "3x+y-2z=5
\n" ); document.write( "---------------
\n" ); document.write( "13x+5y=17
\n" ); document.write( "multiply the first equation by -2 & add to equation #3.
\n" ); document.write( "-6x-3y+4z=-10
\n" ); document.write( "-7x-3y-4z=-7
\n" ); document.write( "----------------
\n" ); document.write( "-13x-6y=-17 now add this equation to the 13x+5y=17 equation.
\n" ); document.write( "13x+5y=17
\n" ); document.write( "--------------
\n" ); document.write( "y=0 ans.
\n" ); document.write( "13x+5*0=17
\n" ); document.write( "13x=17
\n" ); document.write( "x=17/13 ans.
\n" ); document.write( "5*17/13+2*0+z=6
\n" ); document.write( "85/13+z=6
\n" ); document.write( "z=6-85/13
\n" ); document.write( "z=78/13-85/13
\n" ); document.write( "z=-7/13 ans.\r
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