document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=436789>Question 436789</A>: <I><SPAN STYLE=\"word-break: break-all;\"> substitution method to solve equation\r<BR>\n" );
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document.write( "x+4y=5<BR>\n" );
document.write( "2x+13y=15 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #302168 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=302168\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x + 4y = 5 ==> x = 5 - 4y ==> 2(5-4y) + 13y = 15, after substitution.\r<BR>\n" );
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document.write( "10 - 8y + 13y = 15<BR>\n" );
document.write( "==> 10 + 5y = 15 ==> 5y = 5 ==> y = 1 ==> x = 5 - 4*1 = 5 - 4 = 1.\r<BR>\n" );
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document.write( "Hence the solution is (1, 1). </SPAN>\n" );
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