document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1109822>Question 1109822</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The charge $C, for hiring a hall for an event is C = 150 + 2N, where N stands for the number of people at the event. Find:<BR>\n" );
document.write( "a) the charge when 225 people are at the event<BR>\n" );
document.write( "b) the number of people at the event when the charge is $394 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #724760 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=724760\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=\"black\" face=\"times\" size=\"3\">Part (a)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Plug in N = 225 to find C\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "C = 150 + 2N<BR>\n" );
document.write( "C = 150 + 2*225<BR>\n" );
document.write( "C = 150 + 450<BR>\n" );
document.write( "C = 600\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "It will cost $600\r<BR>\n" );
document.write( "\n" );
document.write( "======================================================================<BR>\n" );
document.write( "Part (b)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Plug in C = 394 and solve for (or isolate) N. The idea is to undo PEMDAS.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "C = 150 + 2N<BR>\n" );
document.write( "394 = 150 + 2N<BR>\n" );
document.write( "150 + 2N = 394<BR>\n" );
document.write( "2N + 150 = 394<BR>\n" );
document.write( "2N + 150 - 150 = 394 - 150 <font color=blue>subtract 150 from both sides</font><BR>\n" );
document.write( "2N = 244<BR>\n" );
document.write( "2N/2 = 244/2 <font color=blue>divide both sides by 2</font><BR>\n" );
document.write( "N = 122\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "There are 122 people at the event.<BR>\n" );
document.write( "</font><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );