document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=709505>Question 709505</A>: <I><SPAN STYLE=\"word-break: break-all;\"> *Solving systems of Linear Equations in Three Variables by Elimination*\r<BR>\n" );
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document.write( "does anyone know how to solve x,y,z equations for x and explain?!\r<BR>\n" );
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document.write( "2x + y + z = 0<BR>\n" );
document.write( "3x - y + z = 3<BR>\n" );
document.write( "7x - 5y - 3z = 15<BR>\n" );
document.write( "thanks! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #436613 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=436613\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> solve x,y,z equations for x and explain?! <BR>\n" );
document.write( "2x + y + z = 0<BR>\n" );
document.write( "3x - y + z = 3<BR>\n" );
document.write( "7x - 5y - 3z = 15<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "Setting up:<BR>\n" );
document.write( "Subtract 1st row from 2nd and make the difference the 1st row:<BR>\n" );
document.write( "x  - 2y  + 0 = 3<BR>\n" );
document.write( "2x +  y  + z   = 0<BR>\n" );
document.write( "7x - 5y - 3z = 15<BR>\n" );
document.write( "------------------------------<BR>\n" );
document.write( "Subtract 2*1st row from 2nd row<BR>\n" );
document.write( "Subtract 7*1st row from 3rd row<BR>\n" );
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document.write( "x - 2y + 0 = 3<BR>\n" );
document.write( "0 + 5y + z = -6<BR>\n" );
document.write( "0 + 9y -3z = -6<BR>\n" );
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document.write( "Solve equations 2 and 3 for y and z:<BR>\n" );
document.write( "5y + z = -6<BR>\n" );
document.write( "3y  - z = -2<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Add and solve for \"y\":<BR>\n" );
document.write( "8y = -8<BR>\n" );
document.write( "y = -1<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve for \"z\" using 3y-z = -2<BR>\n" );
document.write( "3*-1 -z = -2<BR>\n" );
document.write( "z = -1<BR>\n" );
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document.write( "Solve for \"x\" using <BR>\n" );
document.write( "2x + y + z = 0<BR>\n" );
document.write( "2x + -1 + -1 = 0<BR>\n" );
document.write( "x = 1<BR>\n" );
document.write( "=========================<BR>\n" );
document.write( "Solution:<BR>\n" );
document.write( "x = 1<BR>\n" );
document.write( "y = -1<BR>\n" );
document.write( "z = -1<BR>\n" );
document.write( "==============================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============================== </SPAN>\n" );
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