document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=140685>Question 140685</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I had a question similar to this one earlier. This one is of a different format though. If Given A5= -5 and A9=10 find d and A1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #102393 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=102393\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given A5= -5 and A9=10 find d and A1<BR>\n" );
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document.write( "a(5) = a(1) + 4d = -5<BR>\n" );
document.write( "a(9) = a(1) + 8d = 10<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "Subtract 1st from 2nd to get:<BR>\n" );
document.write( "4d = 15<BR>\n" );
document.write( "d = 15/4<BR>\n" );
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document.write( "Substitute into a(1)+4d = -5 to solve for a(1)<BR>\n" );
document.write( "a(1) +4(15/4) = -5<BR>\n" );
document.write( "a(1) + 15 = -5<BR>\n" );
document.write( "a(1) = -20<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" );