document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=197720>Question 197720</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2x-5y=4<BR>\n" );
document.write( "5x-7y=-1<BR>\n" );
document.write( "solve by using the matrix row reduction method.<BR>\n" );
document.write( "I've been trying to work on this problem for hours but I'm stuck. Hopefully you can help me. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #148262 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=148262\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2x-5y=4<BR>\n" );
document.write( "5x-7y=-1<BR>\n" );
document.write( "solve by using the matrix row reduction method.<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "2...-5...4<BR>\n" );
document.write( "5...-7...-1<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "Multiply thus the 1st row by 5 and the 2nd row by 2 to get:<BR>\n" );
document.write( "10...-25...20<BR>\n" );
document.write( "10...-14...-2<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "Subtract the 1st row from the 2nd to get:<BR>\n" );
document.write( "10...-25...20<BR>\n" );
document.write( "0.....11...-22<BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "Divide thru the 2nd row by 11 to get:<BR>\n" );
document.write( "10...-25...20<BR>\n" );
document.write( "0......1...-2<BR>\n" );
document.write( "-----------------------------<BR>\n" );
document.write( "Add 25 times the 2nd row to the 1st row to get:<BR>\n" );
document.write( "10.....0...-30<BR>\n" );
document.write( "0......1...-2<BR>\n" );
document.write( "-------------------------<BR>\n" );
document.write( "Divide thru the 1st row by 10 to get:<BR>\n" );
document.write( "1.....0....-3<BR>\n" );
document.write( "0.....1....-2<BR>\n" );
document.write( "====================<BR>\n" );
document.write( "Solution: <BR>\n" );
document.write( "x = -3<BR>\n" );
document.write( "y = -2<BR>\n" );
document.write( "======================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );