document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=510670>Question 510670</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if you had 80 coins some of them are 1 dollar coins and the rest were 50 cent coins the total amount added up to 50 dollars how many coins of each kind were there? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #341847 by </B><A HREF=/tutors/aboutme.mpl?userid=ptaylor><B>ptaylor(2198)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ptaylor><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=ptaylor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=341847\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x=number of 1 dollar coins<BR>\n" );
document.write( "And y=number of 50 cent=1/2  dollar coins<BR>\n" );
document.write( "so:<BR>\n" );
document.write( "x*1+y*(1/2)=50 ---$ understood or<BR>\n" );
document.write( "x+(1/2)y=50-----------------------------------eq1<BR>\n" );
document.write( "and<BR>\n" );
document.write( "x+y=80-----------------------------------------eq2<BR>\n" );
document.write( "subtract eq1 from eq2<BR>\n" );
document.write( "(1/2)y=30<BR>\n" );
document.write( "y=60---------------------------number of 1/2 dollars<BR>\n" );
document.write( "x=80-y=80-60=20-------------- number of dollars<BR>\n" );
document.write( "CK<BR>\n" );
document.write( "60*(1/2)+20*1=50<BR>\n" );
document.write( "50=50\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Hope this helps----ptaylor<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );