document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=178253>Question 178253</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The subway fare in a city is $1.55. People who use the subway may buy a monthly coupon book for $12.00. With the coupon book, the fare decreases to $.95. Determine the number of fares in a month the subway must be used such that the total monthly cost without the coupon book is equal to the total monthly cost with the coupon book. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #135318 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10552)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=135318\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the number of subway fares be s<BR>\n" );
document.write( "Since the total monthly cost without the coupon book should equal the total monthly cost with the coupon book <BR>\n" );
document.write( "Then  s(1.55)   =   s(.95) + 12<BR>\n" );
document.write( "1.55s    =   .95s  +  12<BR>\n" );
document.write( ".6s    =    12<BR>\n" );
document.write( "s     =    20\r<BR>\n" );
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document.write( "Therefore, the number of subway fares in order for the total monthly cost without the coupon book to equal the  total monthly cost with the coupon book is 20.\r<BR>\n" );
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document.write( "Checking:<BR>\n" );
document.write( "Total monthly cost without the coupon book:	 20(1.55)       =   $31.00 <BR>\n" );
document.write( "Total monthly cost with the coupon book:	 20(.95) + 12   =   $31.00<BR>\n" );
document.write( " </SPAN>\n" );
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