document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=225980>Question 225980</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A jar contains 40 coins consisting of dimes and quarters and having a total value of $4.90. How many of each kind of coin are there?\r<BR>\n" );
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document.write( "I know that somehow I use .1d+.25q=$4.90 but I don't know how to add the 40 in there. Help please! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #168424 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=168424\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> two unknowns means two equations\r<BR>\n" );
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document.write( "the one with the 40 is ___ \"40 coins consisting of dimes and quarters\" ___ d + q = 40 ___ d = 40 - q\r<BR>\n" );
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document.write( "substituting ___ .1(40-q) + .25q = 4.90\r<BR>\n" );
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document.write( "distributing ___ 4 -.1q + .25q = 4.90\r<BR>\n" );
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document.write( "subtracting 4 ___ .15q = .90\r<BR>\n" );
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document.write( "dividing by .15 ___ q = 6\r<BR>\n" );
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document.write( "substituting ___ d + 6 = 40 ___ d = 34 </SPAN>\n" );
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