document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1127836>Question 1127836</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the of equation 2x-y+z=-7, x-3y+4z=-19, and -x+4y-3z=18.\r<BR>\n" );
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document.write( "A. There is one solution (-1,2,-3)<BR>\n" );
document.write( "B. There is one solution (1,-2,3)<BR>\n" );
document.write( "C. There is one solution (-1,-2,-3)<BR>\n" );
document.write( "D. There is one solution (1,2,3) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #744338 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20849)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=744338\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "Solve the of equation <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x-y%2Bz=-7 ALIGN=MIDDLE  ALT=\"2x-y%2Bz=-7\"   DISABLED_style= \"max-width:90%; height:auto;\" >................eq.1<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x-3y%2B4z=-19 ALIGN=MIDDLE  ALT=\"+x-3y%2B4z=-19\"   DISABLED_style= \"max-width:90%; height:auto;\" >...........eq.2<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-x%2B4y-3z=18 ALIGN=MIDDLE  ALT=\"-x%2B4y-3z=18\"   DISABLED_style= \"max-width:90%; height:auto;\" >...........eq.3<BR>\n" );
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document.write( "start with<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x-3y%2B4z=-19 ALIGN=MIDDLE  ALT=\"+x-3y%2B4z=-19\"   DISABLED_style= \"max-width:90%; height:auto;\" >...........eq.2<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-x%2B4y-3z=18 ALIGN=MIDDLE  ALT=\"-x%2B4y-3z=18\"   DISABLED_style= \"max-width:90%; height:auto;\" >...........eq.3..........add both<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x-3y%2B4z-x%2B4y-3z=-19%2B18 ALIGN=MIDDLE  ALT=\"+x-3y%2B4z-x%2B4y-3z=-19%2B18\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+z%2By=-1 ALIGN=MIDDLE  ALT=\"+z%2By=-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+z=-1-y ALIGN=MIDDLE  ALT=\"+z=-1-y\"   DISABLED_style= \"max-width:90%; height:auto;\" >..........(1a)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x-y%2Bz=-7 ALIGN=MIDDLE  ALT=\"2x-y%2Bz=-7\"   DISABLED_style= \"max-width:90%; height:auto;\" >................eq.1<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x-3y%2B4z=-19 ALIGN=MIDDLE  ALT=\"+x-3y%2B4z=-19\"   DISABLED_style= \"max-width:90%; height:auto;\" >...........eq.2........multiply by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2 ALIGN=MIDDLE  ALT=\"2\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "-----------------------------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x-y%2Bz=-7 ALIGN=MIDDLE  ALT=\"2x-y%2Bz=-7\"   DISABLED_style= \"max-width:90%; height:auto;\" >................eq.1. <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2x-6y%2B8z=-38 ALIGN=MIDDLE  ALT=\"+2x-6y%2B8z=-38\"   DISABLED_style= \"max-width:90%; height:auto;\" >...........eq.2............subtract<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x-y%2Bz-%282x-6y%2B8z%29=-7-%28-38%29 ALIGN=MIDDLE  ALT=\"2x-y%2Bz-%282x-6y%2B8z%29=-7-%28-38%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x-y%2Bz-2x%2B6y-8z=-7%2B38 ALIGN=MIDDLE  ALT=\"2x-y%2Bz-2x%2B6y-8z=-7%2B38\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5y-7z=31 ALIGN=MIDDLE  ALT=\"5y-7z=31\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5y-31=7z ALIGN=MIDDLE  ALT=\"5y-31=7z\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=%285y-31%29%2F7 ALIGN=MIDDLE  ALT=\"z=%285y-31%29%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" >..........(1b)\r<BR>\n" );
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document.write( "from (1a) and (1b) we have\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285y-31%29%2F7=-1-y ALIGN=MIDDLE  ALT=\"%285y-31%29%2F7=-1-y\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5y-31=-7-7y ALIGN=MIDDLE  ALT=\"5y-31=-7-7y\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5y%2B7y=31-7 ALIGN=MIDDLE  ALT=\"5y%2B7y=31-7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12y=24 ALIGN=MIDDLE  ALT=\"12y=24\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28y=2%29 ALIGN=MIDDLE  ALT=\"highlight%28y=2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "go to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+z=-1-y ALIGN=MIDDLE  ALT=\"+z=-1-y\"   DISABLED_style= \"max-width:90%; height:auto;\" >..........(1a), plug in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y ALIGN=MIDDLE  ALT=\"y\"   DISABLED_style= \"max-width:90%; height:auto;\" > value\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+z=-1-2 ALIGN=MIDDLE  ALT=\"+z=-1-2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+highlight%28z=-3%29 ALIGN=MIDDLE  ALT=\"+highlight%28z=-3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "go to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x-y%2Bz=-7 ALIGN=MIDDLE  ALT=\"2x-y%2Bz=-7\"   DISABLED_style= \"max-width:90%; height:auto;\" >................eq.1 plug in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y ALIGN=MIDDLE  ALT=\"y\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z ALIGN=MIDDLE  ALT=\"z\"   DISABLED_style= \"max-width:90%; height:auto;\" > value\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x-2-3=-7 ALIGN=MIDDLE  ALT=\"2x-2-3=-7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x-5=-7 ALIGN=MIDDLE  ALT=\"2x-5=-7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x=-7%2B5 ALIGN=MIDDLE  ALT=\"2x=-7%2B5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x=-2 ALIGN=MIDDLE  ALT=\"2x=-2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x=-1%29 ALIGN=MIDDLE  ALT=\"highlight%28x=-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "answer: A. There is one solution (<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-1 ALIGN=MIDDLE  ALT=\"-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2 ALIGN=MIDDLE  ALT=\"2\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-3 ALIGN=MIDDLE  ALT=\"-3\"   DISABLED_style= \"max-width:90%; height:auto;\" >)\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );