document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=394909>Question 394909</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A university bookstore recently sold a wirebound graph-paper notebook for $2.15, and a college-ruled notebook for $3.43. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $134.38. How many of each type were sold? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #280274 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=280274\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A university bookstore recently sold a wirebound graph-paper notebook for $2.15, and a college-ruled notebook for $3.43. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $134.38. How many of each type were sold?<BR>\n" );
document.write( "...<BR>\n" );
document.write( "x graph books<BR>\n" );
document.write( "y ruled books<BR>\n" );
document.write( "..<BR>\n" );
document.write( "x+y = 50................1<BR>\n" );
document.write( "2.15x+3.43y = 134.38.....2<BR>\n" );
document.write( "...<BR>\n" );
document.write( "multiply (1) by -2.15<BR>\n" );
document.write( "-2.15x-2.15y=-50*2.15<BR>\n" );
document.write( "add this to (2)<BR>\n" );
document.write( "3.43y-2.15y = 134.38-107.50<BR>\n" );
document.write( "1.28 y= 26.88<BR>\n" );
document.write( "y = 21 ruled books<BR>\n" );
document.write( "29 graph books<BR>\n" );
document.write( "...<BR>\n" );
document.write( "m.ananth@hotmail.ca </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );