document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=143386>Question 143386</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0395352495/algebrahomeworkh>algebra: structure and method: book1</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A math class planned a field trip to a computer center. The trip cost $240 to be paid equally by each student. 4 students suddenly can't go. This increased the cost by $2 per student. How many students went to the computer center? HELP MUCH APPRECIATED!!!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #104373 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=104373\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A math class planned a field trip to a computer center. The trip cost $240 to be paid equally by each student. 4 students suddenly can't go. This increased the cost by $2 per student. How many students went to the computer center? <BR>\n" );
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document.write( "Let original number in class be \"x\"<BR>\n" );
document.write( "Total cost for the group was 240x dollars<BR>\n" );
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document.write( "Average cost when 4 cannot go : 240x/(x-4)<BR>\n" );
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document.write( "EQUATION:<BR>\n" );
document.write( "new average - old average = 2 dollars<BR>\n" );
document.write( "240x/(x-4) - 240 = 2<BR>\n" );
document.write( "240x/(x-4) = 242<BR>\n" );
document.write( "240x = 242x - 968<BR>\n" );
document.write( "2x = 968<BR>\n" );
document.write( "x = 484 (# of students who planned to go to the computer center)<BR>\n" );
document.write( "x-4 = 480 (# of students who actually went)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );