document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=124934>Question 124934</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Allen bought 30 stamps at the post office in 39¢ and 24¢ denominations. If the total cost of the stamps was $9.90, how many 39¢ stamps did Allen buy? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #91595 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=91595\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .39X+.24(30-X)=9.90<BR>\n" );
document.write( ".39X+7.20-.24X=9.90<BR>\n" );
document.write( ".15X=9.90-7.20<BR>\n" );
document.write( ".15X=2.70<BR>\n" );
document.write( "X-2.70/.15<BR>\n" );
document.write( "X=18 THE NUMBER OF $.39 STAMPS BOUGHT.<BR>\n" );
document.write( "30-18=12 IS THE NUMBER OF $.24 STAMPS BOUGHT.<BR>\n" );
document.write( "PROOF<BR>\n" );
document.write( ".39*18+.24*12=9.90<BR>\n" );
document.write( "7.02+2.88=9.90<BR>\n" );
document.write( "9.90=9.90 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );