document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=19292>Question 19292</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi, I need help with this one.  It's driving me crazy!\r<BR>\n" );
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document.write( "A textbook company uses the equations R = 30x and C = 5x + 3000 to represent the revenue and cost of textbook sales respectively.  The number of textbooks is represented by x.\r<BR>\n" );
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document.write( "a) For what number of textbooks is the cost equal to the revenue?\r<BR>\n" );
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document.write( "b) Using the Profit Formula (Profit = Revenue - Cost), write an algabraic expression the represents the Profit for x textbooks.\r<BR>\n" );
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document.write( "Thanks for your help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #9329 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=9329\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a) To find the value of x which makes R = C, just set R = C and solve for x.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30x+=+5x+%2B+3000 ALIGN=MIDDLE  ALT=\"30x+=+5x+%2B+3000\"   DISABLED_style= \"max-width:90%; height:auto;\" > Simplify and solve for x. Subtract 5x from each side.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=25x+=+3000 ALIGN=MIDDLE  ALT=\"25x+=+3000\"   DISABLED_style= \"max-width:90%; height:auto;\" > Divide both sides by 25.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+120 ALIGN=MIDDLE  ALT=\"x+=+120\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Cost = Revenue for 120 books.\r<BR>\n" );
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document.write( "b)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P+=+R+-+C ALIGN=MIDDLE  ALT=\"P+=+R+-+C\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P+=+30x+-+%285x+%2B+3000%29 ALIGN=MIDDLE  ALT=\"P+=+30x+-+%285x+%2B+3000%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Simplify.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P+=+25x+-+3000 ALIGN=MIDDLE  ALT=\"P+=+25x+-+3000\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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