document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=235918>Question 235918</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the solution of the system?\r<BR>\n" );
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document.write( "I'm trying to remember how to start this one..\r<BR>\n" );
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document.write( "x + 7y = 5 (1)\r<BR>\n" );
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document.write( "x= 9-7y (2)\r<BR>\n" );
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document.write( "Do I reverse the second problem to where it is:\r<BR>\n" );
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document.write( "x-7y = 9 (2) ?\r<BR>\n" );
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document.write( "Thank You for your help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #173706 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=173706\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You could do that and go on to use elimination to solve the system or you could use substitution (which is what I'm going to use):\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+%2B+7y+=+5 ALIGN=MIDDLE  ALT=\"x+%2B+7y+=+5\"   DISABLED_style= \"max-width:90%; height:auto;\" > Start with the first equation.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9-7y+%2B+7y+=+5 ALIGN=MIDDLE  ALT=\"9-7y+%2B+7y+=+5\"   DISABLED_style= \"max-width:90%; height:auto;\" > Plug in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=+9-7y+ ALIGN=MIDDLE  ALT=\"x=+9-7y+\"   DISABLED_style= \"max-width:90%; height:auto;\" >. In other words, replace 'x' with 9-7y. Now we can easily solve for 'y' (if there is a solution)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9=+5 ALIGN=MIDDLE  ALT=\"9=+5\"   DISABLED_style= \"max-width:90%; height:auto;\" > Combine like terms.\r<BR>\n" );
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document.write( "Since the equation is clearly false, this means that we have a contradiction and that there are no solutions to the given system. So the system is inconsistent.<BR>\n" );
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