document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=311786>Question 311786</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Bob has a very old car that he;d like to replace. The old car costs $250 each month for repairs, $120 for each month for gas, and $60 each month for insurance. A friend is willing to sell him a reliable used car for $7800. In addition to the price of the car, this used car will cost $90 each month for gas and $80 each month for insurance. If Bob buys the used car, how long will it take before he beings to save money on car expenses. Assign a variable. \r<BR>\n" );
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document.write( "Please help, I can not come up with a logical equation for this question. Thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #222978 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=222978\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Bob has a very old car that he;d like to replace.<BR>\n" );
document.write( " The old car costs $250 each month for repairs, $120 for each month for gas,<BR>\n" );
document.write( " and $60 each month for insurance.<BR>\n" );
document.write( " A friend is willing to sell him a reliable used car for $7800.<BR>\n" );
document.write( " In addition to the price of the car, this used car will cost $90 each month for<BR>\n" );
document.write( "gas and $80 each month for insurance. <BR>\n" );
document.write( "If Bob buys the used car, how long will it take before he begins to save money on car expenses.<BR>\n" );
document.write( " Assign a variable.<BR>\n" );
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document.write( "Let m = the no. of months for him to save money<BR>\n" );
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document.write( "old car expense = new car expense<BR>\n" );
document.write( "m(250+120+60) = 7800 + m(90+80}<BR>\n" );
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document.write( "430m = 7800 + 170m<BR>\n" );
document.write( "430m - 170m = 7800<BR>\n" );
document.write( "260m = 7800<BR>\n" );
document.write( "m = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7800%2F260 ALIGN=MIDDLE  ALT=\"7800%2F260\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "m = 30 months they are equal and will save money in the 31st month </SPAN>\n" );
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