document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=332971>Question 332971</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 4. Fundraising. The St. Mark’s Community Barbecue<BR>\n" );
document.write( "served 250 dinners. A child’s plate cost $3.50 and<BR>\n" );
document.write( "an adult’s plate cost $7.00. A total of $1347.50 was<BR>\n" );
document.write( "collected. How many of each type of plate<BR>\n" );
document.write( "was served? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #238604 by </B><A HREF=/tutors/aboutme.mpl?userid=benazir.sj@gmail.com><B>benazir.sj@gmail.com(109)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=benazir.sj@gmail.com><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=benazir.sj@gmail.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=238604\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> you have to solve this question by linear eqaution:\r<BR>\n" );
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document.write( "Let the childs plate =C<BR>\n" );
document.write( "and the adult plate =A<BR>\n" );
document.write( "total number of dinners =250<BR>\n" );
document.write( "C+A=250----------------(1)\r<BR>\n" );
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document.write( "cost of chids plate =$3.50<BR>\n" );
document.write( "cost of adults plate =$7.00<BR>\n" );
document.write( "total cost =$1347.50<BR>\n" );
document.write( "$3.50C + $7.00 A=$1347.50 ---------------(2)<BR>\n" );
document.write( "now equate the equations (1) and (2)<BR>\n" );
document.write( "C+A=$250<BR>\n" );
document.write( "*7C+7A=7*250<BR>\n" );
document.write( "7C+7A=1750------(x)<BR>\n" );
document.write( "3.50C+7A=1347.50-----(2)<BR>\n" );
document.write( "______________________________<BR>\n" );
document.write( "(x)-(2) => 3.50C =402.5<BR>\n" );
document.write( "C=402.5/3.5<BR>\n" );
document.write( "C=115<BR>\n" );
document.write( "C+A=250<BR>\n" );
document.write( "A=250-115=135\r<BR>\n" );
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document.write( "Childs plate =115and adults plate =135\r<BR>\n" );
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document.write( "proof:<BR>\n" );
document.write( "$3.50C + $7.00 A=$1347.50 <BR>\n" );
document.write( "$3.50*115 +$7*135 =$1347.50<BR>\n" );
document.write( "$402.5+$945 =$1347.5<BR>\n" );
document.write( "$1347.50=$1347.50 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );