document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1089986>Question 1089986</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Customers of a phone company can choose between two service plans for long distance calls. The first plan has a $17 monthly fee and charges and additional $0.08 for each minute of calls. The second plan has a <BR>\n" );
document.write( "$9 monthly fee and charges an additional $0.13 for each minute of calls. For how many minutes of calls will the costs of the two plans be equal?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #704397 by </B><A HREF=/tutors/aboutme.mpl?userid=EMStelley><B>EMStelley(208)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=EMStelley><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=EMStelley><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=704397\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We need to start by setting up an equation for the monthly cost of each plan. To do this we need to name a variable for the number of minutes, let's say x. Let's call the first plan A and the second plan B.  Then if the first plan has a $17 monthly fee and $0.08 per minute, we can represent that as:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A+=+17+%2B+0.08x ALIGN=MIDDLE  ALT=\"A+=+17+%2B+0.08x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The second plan is $9 monthly plus $0.13 per minute, so <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=B+=+9+%2B+0.13x ALIGN=MIDDLE  ALT=\"B+=+9+%2B+0.13x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The question is asking when they will be the same, so we literally set them equal to each other.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=17+%2B+0.08x+=+9+%2B+0.13x ALIGN=MIDDLE  ALT=\"17+%2B+0.08x+=+9+%2B+0.13x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Subtracting 9 to the left, and 0.08x to the right, we have<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8+=+0.05x ALIGN=MIDDLE  ALT=\"8+=+0.05x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Lastly, by dividing both sides by 0.05, we get<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+160 ALIGN=MIDDLE  ALT=\"x+=+160\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So the cost of the two plans will be equal when the number of minutes is 160. </SPAN>\n" );
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