document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=313128>Question 313128</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how do you do this one....i have tried to come up with the equations and have had no luck\r<BR>\n" );
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document.write( "for the prob.  you have to put it into a pair of linear equations in two variables then solve the equations using elimination or substitution..\r<BR>\n" );
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document.write( "Mrs. Boyd has a desk full of quarters and nickels.  if she has a total of 25 coins with a total face value of 2.85 how many nickels would she have?\r<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 #223931 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=223931\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mrs. Boyd has a desk full of quarters and nickels.<BR>\n" );
document.write( "n = no. of nickels<BR>\n" );
document.write( "q = no. of quarters <BR>\n" );
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document.write( "\"if she has a total of 25 coins\"<BR>\n" );
document.write( "n + q = 25<BR>\n" );
document.write( "q = (25-n); use this form for substitution<BR>\n" );
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document.write( "\" with a total face value of 2.85\"<BR>\n" );
document.write( ".05n + .25q = 2.85<BR>\n" );
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document.write( "Substitute (25-n) for q<BR>\n" );
document.write( ".05n + .25(25-n) = 2.85<BR>\n" );
document.write( ".05n + 6.25 - .25n = 2.85<BR>\n" );
document.write( ".05n - .25n = 2.85 - 6.25<BR>\n" );
document.write( "-.20n = -3.40<BR>\n" );
document.write( "n = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-3.4%29%2F%28-.2%29 ALIGN=MIDDLE  ALT=\"%28-3.4%29%2F%28-.2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "n = +17 nickels<BR>\n" );
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document.write( "Check solution finding the total value; 25 - 17 = 8 quarters<BR>\n" );
document.write( ".05(17) + .25(8) =<BR>\n" );
document.write( ".85 + 2.00 = 2.85; confirms our solution of n=17\r<BR>\n" );
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