document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=72189>Question 72189</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/013052316x/algebrahomeworkh>Prentice Hall Mathematics Algebra 1</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> You have a total or 21 coins, all nickels and dimes. the total value is $1.70. Write and solve a system of equations to find the number of dimes d and the number of nickles n that you have. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #51661 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley75><B>checkley75(3666)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley75><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=51661\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> n+d=21, n=21-d<BR>\n" );
document.write( "5n+10d=170 now substitute (21-d) for n & solve.<BR>\n" );
document.write( "5(21-d)+10d=170<BR>\n" );
document.write( "105-5d+10d=170<BR>\n" );
document.write( "5d=170-105<BR>\n" );
document.write( "5d=65<BR>\n" );
document.write( "d=65/5<BR>\n" );
document.write( "d=13 answer for the number of dimes. <BR>\n" );
document.write( "n+13=21<BR>\n" );
document.write( "n=21-13<BR>\n" );
document.write( "n=8 answer for the number of nickels.<BR>\n" );
document.write( "proof<BR>\n" );
document.write( "5*8+10*13=170<BR>\n" );
document.write( "40+130=170<BR>\n" );
document.write( "170=170 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );