document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=566014>Question 566014</A>: <I><SPAN STYLE=\"word-break: break-all;\"> S10=-20 and d=4 find a1 <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #366055 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=366055\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> S10=-20 and d=4 find a1 <BR>\n" );
document.write( "-----<BR>\n" );
document.write( "S(10) = a(1) + (n-1)d<BR>\n" );
document.write( "-20 = a(1) + 9*4<BR>\n" );
document.write( "a(1) = -20-36<BR>\n" );
document.write( "a(1) = -56<BR>\n" );
document.write( "================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "================== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );