document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=448549>Question 448549</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A dealer sold a certain number of portable TV sets at P6,400 each. The dealer would have taken in as much money had 3 fewer sets been sold at P7,680. How many sets were sold at P6,400? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #308698 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><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=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=308698\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The amount of money taken in by the dealer is the same in both cases.<BR>\n" );
document.write( "Let x = the number sold at $6400<BR>\n" );
document.write( "The amount taken in at $6400 is:<BR>\n" );
document.write( "6400x<BR>\n" );
document.write( "And the amount that would have been taken in at $7680 is:<BR>\n" );
document.write( "7680(x-3) [3 fewer sets]<BR>\n" );
document.write( "Now we set these two equations equal and solve for x:<BR>\n" );
document.write( "6400x = 7680(x-3)<BR>\n" );
document.write( "1280x = 23040<BR>\n" );
document.write( "x = 18<BR>\n" );
document.write( "Therefore, 18 sets were sold </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );