document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=639953>Question 639953</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How to solve the following:\r<BR>\n" );
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document.write( "3x-y =7 when y=2x-4\r<BR>\n" );
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document.write( "Thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #402963 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10556)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=402963\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "How to solve the following:\r<BR>\n" );
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document.write( "3x-y =7 when y=2x-4\r<BR>\n" );
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document.write( "3x - y = 7 ----- eq (i)\r<BR>\n" );
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document.write( "y = 2x - 4 ----- eq (ii)\r<BR>\n" );
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document.write( "3x - (2x - 4) = 7 ---- Substituting 2x - 4 for y in eq (i)\r<BR>\n" );
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document.write( "3x - 2x + 4 = 7\r<BR>\n" );
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document.write( "x = 7 - 4\r<BR>\n" );
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document.write( "y = 2(3) - 4 ----- Substituting 3 for x in eq (ii)\r<BR>\n" );
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document.write( "y = 6 - 4\r<BR>\n" );
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