document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=936422>Question 936422</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi, could someone please help me with this problem? I'm quite stuck.<BR>\n" );
document.write( "The trouble for me here relies on the meaning of this symbol: \"#\" Could you tell me what that means? And moreover, how can or does it apply to the following problem?\r<BR>\n" );
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document.write( "Let x#y=2x-3y and x*y=x-y. If x=10 and y=12, evaluate (x#y)*y.\r<BR>\n" );
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document.write( "Thank you in advance,<BR>\n" );
document.write( "Marcelino </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #569878 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=569878\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> OK.  This problem has defined the expression x#y to equal 2x-3y and x*y to equal x-y.  The problem could just as easily defined the expression x$y to equal 2x-3y and x^^y to equal x-y.  So, the way I see it, the symbols # and * mean nothing at all.<BR>\n" );
document.write( "Now it seems to me like (x#y)*y would equal (x#y)-y and (x#y) would equal 2x-3y.  Sooo we have (x#y)*y=2x-3y-y=2x-4y <BR>\n" );
document.write( "substitute x=10 and y=12 we have<BR>\n" );
document.write( "(x#y)*y=2(10)-4(12)=-28\r<BR>\n" );
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document.write( "Does this help?---ptaylor </SPAN>\n" );
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