document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=334095>Question 334095</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve this equation using any method.\r<BR>\n" );
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document.write( "x+y-z=-20<BR>\n" );
document.write( "2x-y+z=11 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #239368 by </B><A HREF=/tutors/aboutme.mpl?userid=nyc_function><B>nyc_function(2741)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nyc_function><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=nyc_function><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=239368\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> After playing with this strange question, I came up with the following:\r<BR>\n" );
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document.write( "Add the two equations and you get:<BR>\n" );
document.write( "3x = -9 so x = -3\r<BR>\n" );
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document.write( "Now substitute this value to get:\r<BR>\n" );
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document.write( "y -z = -17<BR>\n" );
document.write( "-y +z = 17\r<BR>\n" );
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document.write( "So, y = -17 + z for any value of z. ie. infinite number of solutions.<BR>\n" );
document.write( "Try it out.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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