document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=716302>Question 716302</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please help me to understand substitution. here is an example 2x+5y=5<BR>\n" );
document.write( "                                                              x+3y=4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #439823 by </B><A HREF=/tutors/aboutme.mpl?userid=lynnlo><B>lynnlo(4176)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lynnlo><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=439823\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2X+5Y=5<BR>\n" );
document.write( "X+3Y=4<BR>\n" );
document.write( "USING SUBSTITUTION METHOD:<BR>\n" );
document.write( "X AS A FUNCTION OF Y(FROM THE FIRST EQUATION X=(5-5Y)/2<BR>\n" );
document.write( "SUBSTITUTE INTO SECOND EQUATION<BR>\n" );
document.write( "1(5+5Y)/2+3Y=4<BR>\n" );
document.write( "SIMPLIFY:<BR>\n" );
document.write( "1Y=3 OR Y=3<BR>\n" );
document.write( "SUBSTITUTING Y=3 BACK INTO THE X EXPRESSED AS FUNCTION OF Y<BR>\n" );
document.write( "X=(5-5Y)/2=-5 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );