document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=234380>Question 234380</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Translate the problem into a pair of linear equations in two variables.\r<BR>\n" );
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document.write( "A sum of money amounting to $3.80 consist of dimes and quarters. If there are 20 coins in all, how many are quarters? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #172814 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=172814\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Q+D=20 OR Q=20-D<BR>\n" );
document.write( ".25Q+.10D=3.80<BR>\n" );
document.write( ".25(20-D)+.10D=3.80<BR>\n" );
document.write( "5-.25D+.10D=3.80<BR>\n" );
document.write( "-15D=3.80-5<BR>\n" );
document.write( ".15D=1.20<BR>\n" );
document.write( "D=1.20/.15<BR>\n" );
document.write( "D=8 NUMBER OF DIMES.<BR>\n" );
document.write( "Q=20-8=12 NUMBER OF QUARTERS.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( ".25*12+8*.10=3.80<BR>\n" );
document.write( "3+.80=3.80<BR>\n" );
document.write( "3.80=3.80 </SPAN>\n" );
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