document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=709251>Question 709251</A>: <I><SPAN STYLE=\"word-break: break-all;\"> PLEASE HELP!!!!!!!!!!!!!!!!!!! \r<BR>\n" );
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document.write( "SOLVE FOR X <BR>\n" );
document.write( "2x + y + z = 0 <BR>\n" );
document.write( "3x - y + z = 3 <BR>\n" );
document.write( "7x - 5y - 3z = 15\r<BR>\n" );
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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 #436536 by </B><A HREF=/tutors/aboutme.mpl?userid=hheuler><B>hheuler(6)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=hheuler><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/cgi-bin/show-face.mpl?user=hheuler><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=436536\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> eq 1 2x + y + z = 0 <BR>\n" );
document.write( "eq 2 3x - y + z = 3 <BR>\n" );
document.write( "Eq 3 7x - 5y - 3z = 15\r<BR>\n" );
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document.write( "Add eq 1 and eq 2: 5x + 2z = 3 and z = 1/2[3 - 5x] eq 4\r<BR>\n" );
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document.write( "Subtract eq 1 from eq 2; x - 2y = 3 and y = 1/2[x - 3] eq 5\r<BR>\n" );
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document.write( "Substitute eq 4 and eq 5 into eq 3 giving:\r<BR>\n" );
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document.write( "7x - 5[1/2(x - 3)] - 3[1/2(3 - 5x)] = 15\r<BR>\n" );
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document.write( "Multiply both sides of this equation by 2 to eliminate the fractions and simplify the resulting equation by adding like terms. Isolate the variable x to the left side of the equation. \r<BR>\n" );
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document.write( "14x - 5x + 15 - 9 + 15x = 30\r<BR>\n" );
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document.write( "24x = 24\r<BR>\n" );
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document.write( "x  = 1\r<BR>\n" );
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document.write( "From eq 4 we have z = 1/2(3 - 5(1)] = -1<BR>\n" );
document.write( "From eq 5, we have y = 1/2[1 - 3] = -1\r<BR>\n" );
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document.write( "The solution is (x, y, z) = (1, -1, -1).<BR>\n" );
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