document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=945567>Question 945567</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have 30 coins consisting of 5c coins and 20c coins. If the total value of the coins is $3.45, how many coins do I have?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #576733 by </B><A HREF=/tutors/aboutme.mpl?userid=kmanu><B>kmanu(1)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=kmanu><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=576733\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x be the number of 5c coins<BR>\n" );
document.write( "and y be the number of 20c coins<BR>\n" );
document.write( "So we get the two equations as<BR>\n" );
document.write( "x + y = 30 ........(1)<BR>\n" );
document.write( "0.05x + 0.2x = $3.45 .........(2)<BR>\n" );
document.write( "Multiplying equation (1) by -0.05 we get<BR>\n" );
document.write( "-0.05x - 0.05y = -1.5 ..........(3)<BR>\n" );
document.write( "Adding equation (1) and (3) we get<BR>\n" );
document.write( "0.15y = 1.95<BR>\n" );
document.write( "Dividing both sides by 0.15 we get<BR>\n" );
document.write( "y = 13<BR>\n" );
document.write( "Now put y = 13 in equation (1) we get<BR>\n" );
document.write( "x + 13 = 30<BR>\n" );
document.write( "Subtracting both sides by 13 we get<BR>\n" );
document.write( "y = 17\r<BR>\n" );
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document.write( "So , you use 13 5c coins and 17 20c coins </SPAN>\n" );
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