document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1189354>Question 1189354</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sum of the first twelve terms of an Arithmetic progression is 168. If the third term is 7, calculate:<BR>\n" );
document.write( "(I) The common difference<BR>\n" );
document.write( "(ii) The first term </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #820696 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39623)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=820696\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2812%2F2%29%28A%2BA%2Bd%28n-1%29%29=168 ALIGN=MIDDLE  ALT=\"%2812%2F2%29%28A%2BA%2Bd%28n-1%29%29=168\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6%282A%2Bnd-d%29=168 ALIGN=MIDDLE  ALT=\"6%282A%2Bnd-d%29=168\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6%282A%2B12d-d%29=168 ALIGN=MIDDLE  ALT=\"6%282A%2B12d-d%29=168\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%286%282A%2B11d%29=168%29 ALIGN=MIDDLE  ALT=\"highlight_green%286%282A%2B11d%29=168%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "--\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28A%2B2d=7%29 ALIGN=MIDDLE  ALT=\"highlight_green%28A%2B2d=7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The two outlined equations are linear in two unknown variables.   Solve. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );