document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1134769>Question 1134769</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The rent charged for 2 different sized office spaces in an office building is as follows: 600 square feet for $1250 and 900 square feet for $1850.  The rent includes not only the cost per square foot (which is the same no matter the size) but also includes a processing fee.How much is the processing fee?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #752247 by </B><A HREF=/tutors/aboutme.mpl?userid=mathsolverplus><B>mathsolverplus(88)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mathsolverplus><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=mathsolverplus><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=752247\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = area of the office spaces in (sq.ft)<BR>\n" );
document.write( "Let m = rate<BR>\n" );
document.write( "Let b = processing fee\r<BR>\n" );
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document.write( "Cost = rate(x) + processing fee<BR>\n" );
document.write( "Cost = m(x) + b\r<BR>\n" );
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document.write( "1250 = m(600) + b<BR>\n" );
document.write( "1850 = m(900) + b\r<BR>\n" );
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document.write( "Subtract the two equations:<BR>\n" );
document.write( "-600 = -300m<BR>\n" );
document.write( "m = 2\r<BR>\n" );
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document.write( "Substitute m = 2 back into one of the equations:<BR>\n" );
document.write( "1250 = 1200 + b<BR>\n" );
document.write( "b = 50\r<BR>\n" );
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document.write( "Therefore, the processing fee is $50.\r<BR>\n" );
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