document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=452586>Question 452586</A>: <I><SPAN STYLE=\"word-break: break-all;\"> increasing the average speed of a car by 12 mph results in a 189 mile trip taking an hour less than before. What was the orginal average speed of the car? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #311321 by </B><A HREF=/tutors/aboutme.mpl?userid=jorel1380><B>jorel1380(3719)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jorel1380><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=jorel1380><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=311321\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 189/x=189/(x+12)+1<BR>\n" );
document.write( "189(x+12)=189(x)+x2+12x<BR>\n" );
document.write( "189x+2268=189x+x2+12x<BR>\n" );
document.write( "x2+12x-2268=0<BR>\n" );
document.write( "(x+58)(x-46)=0<BR>\n" );
document.write( "x=46 or -58<BR>\n" );
document.write( "Throwing out the negative answer, we get the original speed of the car to be 46 mph.. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );