document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=256129>Question 256129</A>: <I><SPAN STYLE=\"word-break: break-all;\"> an incandesent 60-W lightbulb costs $.50 to buy and $.12 per day to use (24 hrs of usage). A compact fluorescent lamp (CFL) that produces the equivalent amount of ligh costs $2.50 to buy and $.02 per day to use. Determine the number of days of usage when these costs are equivalent. What is this equivalent cost?\r<BR>\n" );
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document.write( "How to set this up? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #188295 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=188295\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .50+.12x=2.50+.02x<BR>\n" );
document.write( ".12x-.02x=2.50-.50<BR>\n" );
document.write( ".10x=2<BR>\n" );
document.write( "x=2/.10<BR>\n" );
document.write( "x=20 hours the cost will be the same.<BR>\n" );
document.write( ".50+.12*20<BR>\n" );
document.write( ".50+2.40=$2.90 total cost.<BR>\n" );
document.write( "2.50+.02*20<BR>\n" );
document.write( "2.50+.40=$2.90 total cost. </SPAN>\n" );
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