document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=163851>Question 163851</A>: <I><SPAN STYLE=\"word-break: break-all;\"> M (8,6) is the midpoint of RS. The coordinates of S are (9,7). What are the coordinates of R? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #120702 by </B><A HREF=/tutors/aboutme.mpl?userid=midwood_trail><B>midwood_trail(310)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=midwood_trail><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=120702\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> M (8,6) is the midpoint of RS. The coordinates of S are (9,7). What are the coordinates of R?\r<BR>\n" );
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document.write( "The midpoint formula is:\r<BR>\n" );
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document.write( "M = [(x1 + x2)/2, (y1 + y2)/2]\r<BR>\n" );
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document.write( "We are given the midpoint to be (8,6).\r<BR>\n" );
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document.write( "We are also given point S to be (9,7).\r<BR>\n" );
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document.write( "We set it up this way:\r<BR>\n" );
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document.write( "(8,6) = [(x + 9)/2, (y + 7)/2]\r<BR>\n" );
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document.write( "We now equate (x + 9)/2 to 8 and solve for x and then we equate (y + 7)/2 to 6 and solve for y.\r<BR>\n" );
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document.write( "(x + 9)/2 = 8\r<BR>\n" );
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document.write( "Multiply both sides by 2.\r<BR>\n" );
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document.write( "x + 9 = 8 (2)\r<BR>\n" );
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document.write( "x + 9 = 16\r<BR>\n" );
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document.write( "x = 16 - 9\r<BR>\n" );
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document.write( "x = 7\r<BR>\n" );
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document.write( "We now do the same for y.\r<BR>\n" );
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document.write( "(y + 7)/2 = 6\r<BR>\n" );
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document.write( "y + 7 = 6 (2)\r<BR>\n" );
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document.write( "y + 7 = 12\r<BR>\n" );
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document.write( "y = 12 - 7\r<BR>\n" );
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document.write( "y = 5\r<BR>\n" );
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document.write( "The coordinates of point R are (7, 5)\r<BR>\n" );
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document.write( "Did you follow? </SPAN>\n" );
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