document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=508724>Question 508724</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1 2 3 4 5 N<BR>\n" );
document.write( "5 9 13 17 21 __  What is the missing value?\r<BR>\n" );
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document.write( "I believe the answer is N + 19. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #341070 by </B><A HREF=/tutors/aboutme.mpl?userid=jerryguo41><B>jerryguo41(197)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jerryguo41><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=jerryguo41><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=341070\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> so for these problems I personally like to represent X as the input and Y as output so <BR>\n" );
document.write( "2x+1=y is your pattern\r<BR>\n" );
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document.write( "Plug 21 in<BR>\n" );
document.write( "2x+1=21<BR>\n" );
document.write( "minus one on both sides<BR>\n" );
document.write( "2x=20<BR>\n" );
document.write( "divide<BR>\n" );
document.write( "x=10 <BR>\n" );
document.write( "So your missing N = 10 </SPAN>\n" );
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