document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=56329>Question 56329</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Thanks again!!!!<BR>\n" );
document.write( "Solve by addition. If a unique answer does not exist, state whether it is inconsistent or dependant. McGraw Hill. 6th editon. 8.2. #20.<BR>\n" );
document.write( "x+5y=10<BR>\n" );
document.write( "-2x-10y=20 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #38203 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=38203\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1st: x+5y=10<BR>\n" );
document.write( "2nd: -2x-10y=20<BR>\n" );
document.write( "Multiply 1st by -2 to get:<BR>\n" );
document.write( "3rd: -2x-10y=-40<BR>\n" );
document.write( "Notice that 3rd contradict 2nd.<BR>\n" );
document.write( "If you subtract 3rd from 2nd you get:<BR>\n" );
document.write( "0=60<BR>\n" );
document.write( "That shows the original system is a <BR>\n" );
document.write( "contradiction.  That means there is<BR>\n" );
document.write( "no solution.  It also means the graphs<BR>\n" );
document.write( "of the two lines are parallel.<BR>\n" );
document.write( "cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );