document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=142918>Question 142918</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with this word problem which needs to be solved using a system of two linear equations.  Thank you in advance for your help.\r<BR>\n" );
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document.write( "A university bookstore recently sold a wirebound graph-paper notebook for $2.50, and a college-ruled notebook for $2.30.  At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $118.60.  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 #103992 by </B><A HREF=/tutors/aboutme.mpl?userid=jojo14344><B>jojo14344(1513)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jojo14344><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=103992\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sure!<BR>\n" );
document.write( "First, Let's assigned \"x\" for wirebound notebk, and \"y' for college notebk, and we know the total is 50. Equating the fact, \"x+y=50\" right? -------- eqn 1<BR>\n" );
document.write( "Next, $2.50 of each wirebound were sold PLUS $2.30 each of college also sold and total to $118.60. Equating that fact,<BR>\n" );
document.write( "$2.50(x) + $2.30(y) = $118.60, isn't it?  -----------  eqn 2<BR>\n" );
document.write( "Go back eqn 1 we get \"y=50-x\" and substitute this value of y in eqn 2. Continuing,<BR>\n" );
document.write( "$2.50(x) + $2.30(50-x) = $118.60<BR>\n" );
document.write( "$2.50(x) + $115 -$2.30(x) = $118.60<BR>\n" );
document.write( "$0.20(x) = $118.60-$115<BR>\n" );
document.write( "$0.20(x) = $ $3.60<BR>\n" );
document.write( "x= 18,  total pieces for wirebound notebook<BR>\n" );
document.write( "in eqn 1 we get y=50-18= 32 pieces, total for college ruled notebk<BR>\n" );
document.write( "In doubt? Go back eqn 2,<BR>\n" );
document.write( "$2.50(18) + $2.30(32) =$118.60<BR>\n" );
document.write( "$45 + $73.60 = $118.60<BR>\n" );
document.write( "$118.60 = $118.60, cool!<BR>\n" );
document.write( "Thank you,<BR>\n" );
document.write( "Jojo </SPAN>\n" );
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