document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=614855>Question 614855</A>: <I><SPAN STYLE=\"word-break: break-all;\"> COULD SOMEONE HELP ME WITH THIS PROBLEM:\r<BR>\n" );
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document.write( " A university bookstore recently sold a wirebound graph-paper notebook for $3.36, and a college-ruled notebook for $4.57. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $205.51. How many of each type were sold?<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 #386789 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=386789\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = number of wire bound notebooks<BR>\n" );
document.write( "y = number of college ruled notebooks<BR>\n" );
document.write( "x + y = 50<BR>\n" );
document.write( "3.36 * x + 4.57 * y = 205.51<BR>\n" );
document.write( "solve these 2 equations simultaneously to get your answer.<BR>\n" );
document.write( "from the first equation, solve for y to get:<BR>\n" );
document.write( "y = 50 - x<BR>\n" );
document.write( "substitute this value of y in the second equation to get:<BR>\n" );
document.write( "3.36 * x + 4.57 * (50-x) = 205.51<BR>\n" );
document.write( "simplify to get:<BR>\n" );
document.write( "3.36 * x + 4.57 * 50 - 4.57 * x = 205.51<BR>\n" );
document.write( "combine like terms to get:<BR>\n" );
document.write( "-1.21 * x + 228.5 = 205.51<BR>\n" );
document.write( "subtract 228.5 from both sides of the equation to get:<BR>\n" );
document.write( "-1.21 * x = -22.9<BR>\n" );
document.write( "divide both sides of this equation by -1.21 to get:<BR>\n" );
document.write( "x = -22.9 / -1.21 = 19<BR>\n" );
document.write( "since x + y = 50, this means that y = 31<BR>\n" );
document.write( "3.36 * 19 + 4.57 * 31 = 205.51<BR>\n" );
document.write( "numbers check out.<BR>\n" );
document.write( "answer is:<BR>\n" );
document.write( "number of wire bound notebooks is 19 and number of college ruled notebooks is 31.<BR>\n" );
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