document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1058127>Question 1058127</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A total of four hundred people attended the local symphony's holiday concert at the civic center. The admission prices were $12 for adults, $9 for high school students, and $5 for children. The ticket sales totaled $3215. The symphony's director suggested that next year they raise the prices to $15 for adults, $10 for high school students, and $6 for children. She said that if the same number of people attended next year, the ticket sales at the higher price will total $3817. How many adults, high school students, and children attended THIS YEAR? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #673158 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</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=673158\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y adults, s students, c children;\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "This year:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28y%2Bs%2Bc=400%2C12y%2B9s%2B5c=3215%29 ALIGN=MIDDLE  ALT=\"system%28y%2Bs%2Bc=400%2C12y%2B9s%2B5c=3215%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Next year:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15y%2B10s%2B6c=3817 ALIGN=MIDDLE  ALT=\"15y%2B10s%2B6c=3817\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Arrange this system and try to use row reduction of the system as a matrix:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28y%2Bs%2Bc=400%2C12y%2B9s%2B5c=3215%2C15y%2B10s%2B6c=3817%29 ALIGN=MIDDLE  ALT=\"system%28y%2Bs%2Bc=400%2C12y%2B9s%2B5c=3215%2C15y%2B10s%2B6c=3817%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );