document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=148274>Question 148274</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Could you please help me with this problem. I am supposed to use a system of equations to solve this question.<BR>\n" );
document.write( "I have 30 coins worth $6.00. The coins are quarters and dimes. How many of each do I have?<BR>\n" );
document.write( "Thank you very much! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #108677 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=108677\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D + Q = 30 (30 Dimes and Quarters)<BR>\n" );
document.write( "10D + 25Q = 600  ($6)<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "Substitute for D (D=30-Q)<BR>\n" );
document.write( "10(30-Q) + 25Q = 600<BR>\n" );
document.write( "300 - 10Q + 25Q = 600<BR>\n" );
document.write( "15Q = 300<BR>\n" );
document.write( "Q = 20<BR>\n" );
document.write( "D = 10<BR>\n" );
document.write( "Check, it works. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );