document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=493005>Question 493005</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need to create and solve an equation, but I don't know how. <BR>\n" );
document.write( "The problem is: A moving company weighs 20 boxes you have packed that contain either books or clothes and says that the total weight is 404 pounds. You know that a box of books weighs 40 pounds and a box of clothes weighs 7 pounds. How many boxes of books and how many of clothes did you pack? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #335245 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=335245\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let B = the number of boxes of books and their total weight will then be B*(40lbs).<BR>\n" );
document.write( "The number of boxes of clothes will be (20-B) and their total weight will be (20-B)*(7lbs). The sum of the weights of all of these boxes will be 404lbs.<BR>\n" );
document.write( "Let's write the equation that models this situation:<BR>\n" );
document.write( "B*(40)+(20-B)*(7) = 404 Simplify this and solve for B.<BR>\n" );
document.write( "40B+140-7B = 404 Subtract 140 from both sides.<BR>\n" );
document.write( "40B-7B = 264<BR>\n" );
document.write( "33B = 264  Divide both sides by 33.<BR>\n" );
document.write( "B = 8<BR>\n" );
document.write( "and 20-B = 12.<BR>\n" );
document.write( "There were 8 boxes of books and 12 boxes of clothes.  </SPAN>\n" );
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