document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=60374>Question 60374</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 8x+9y=1<BR>\n" );
document.write( "-2x+6y=5 solve this matrix.  I am the older sister, who hasnt done matrix stuff since high school.  I am trying to remember how to solve this equation. can you please help. sorry i didnt try, i doont have a book or anything. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #41550 by </B><A HREF=/tutors/aboutme.mpl?userid=kayeith><B>kayeith(17)</B></A><img src=\"/images/stars/stars-06.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=kayeith><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=41550\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 8x + 9y = 1<BR>\n" );
document.write( "- 2x + 6y = 5\r<BR>\n" );
document.write( "\n" );
document.write( "a = 8    b = 9  c = 1<BR>\n" );
document.write( "d = - 2  e = 6  f = 5\r<BR>\n" );
document.write( "\n" );
document.write( "D = ae - db = (8)(6) - (-2)(9) = 48 + 18 = 66<BR>\n" );
document.write( "Dx = ce - fb = (1)(6) - (5)(9) = 6 - 45 = - 39<BR>\n" );
document.write( "Dy = af - dc = (8)(5) - (-2)(1) = 40 + 2 = 42<BR>\n" );
document.write( "x = Dx / D = -39 / 66 = -13 / 22<BR>\n" );
document.write( "y = Dy / D = 42 / 66 = 11 / 33 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );