document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=514348>Question 514348</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me.  I don't get the concept. \"which points lie on the graph of the plane x + y -z = 15\"\r<BR>\n" );
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document.write( "A. (5,10,0) B. (20,5,10) c. (5,5,5) d. (10,3,-2)\r<BR>\n" );
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document.write( "Write three more points on the graph of the plane.\r<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 #343388 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=343388\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \"which points lie on the graph of the plane x + y -z = 15\" <BR>\n" );
document.write( "A. (5,10,0) <BR>\n" );
document.write( "Substitute x = 5 ; y = 10 ; z = 0 to see if you get a true equality:<BR>\n" );
document.write( "5 + 10 - 0 = 15<BR>\n" );
document.write( "true<BR>\n" );
document.write( "So, that point lies on the graph of that plane.<BR>\n" );
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document.write( "Do the same for \"B\" and for \"C\".\r<BR>\n" );
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document.write( "B. (20,5,10) c. (5,5,5) d. (10,3,-2)<BR>\n" );
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document.write( "Write three more points on the graph of the plane.<BR>\n" );
document.write( "Let x be any number<BR>\n" );
document.write( "Let y be any number<BR>\n" );
document.write( "Then solve for \"z\"<BR>\n" );
document.write( "Example<BR>\n" );
document.write( "Let x = 2 ; Let y = -1<BR>\n" );
document.write( "2 + (-1) -z = 15<BR>\n" );
document.write( "1 - z = 15<BR>\n" );
document.write( "z = -14<BR>\n" );
document.write( "Point: (2,-1,-14) will be on the graph of the plane.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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