\r\n" );
document.write( "Line the equations up like this:\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "To make the y terms cancel, multiply the\r\n" );
document.write( "bottom equation through by 2, which will \r\n" );
document.write( "make the 2y term become 4y which will \r\n" );
document.write( "cancel with the -4y term in the top equation,\r\n" );
document.write( "when we add equals to equals\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Adding term by term gives:\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( " 
\r\n" );
document.write( "\r\n" );
document.write( "Since that is a nasty fraction, do not substitute it,\r\n" );
document.write( "as you would if it had been a nice integer. Instead, \r\n" );
document.write( "start over and eliminate the other variable:\r\n" );
document.write( "\r\n" );
document.write( " \r\n" );
document.write( "\r\n" );
document.write( "To make the x terms cancel, the LCM of 15 and 9 is\r\n" );
document.write( "45. So we multiply the top equation through by 3,\r\n" );
document.write( "and the bottom equation through by -5, which will \r\n" );
document.write( "make the 15x term become 45x, and the 9x in the\r\n" );
document.write( "bottom equation become -45x which will cancel when \r\n" );
document.write( "we add equals to equals:\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Adding term by term gives:\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( " 
\r\n" );
document.write( "\r\n" );
document.write( " 
\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" );
document.write( "![\"\"](\"/images/stars/stars-13.gif\")
