document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=815894>Question 815894</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you please answer this question?<BR>\n" );
document.write( "Find a and b so that the line ax+by=9 passes through the points (1,-2) and (4,1) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #491289 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=491289\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ax+by=9<BR>\n" );
document.write( "(1,-2) and (4,1)<BR>\n" );
document.write( "1a-2b=9<BR>\n" );
document.write( "4a+b=9\r<BR>\n" );
document.write( "\n" );
document.write( "double the second\r<BR>\n" );
document.write( "\n" );
document.write( "1a-2b=9<BR>\n" );
document.write( "8a+2b=18<BR>\n" );
document.write( "add them<BR>\n" );
document.write( "9a=27<BR>\n" );
document.write( "a=3<BR>\n" );
document.write( "3-2b=9<BR>\n" );
document.write( "-2b=6<BR>\n" );
document.write( "b=-3<BR>\n" );
document.write( "ax+by=9<BR>\n" );
document.write( "3x-3y=9\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );