document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=163977>Question 163977</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone please help me with these.\r<BR>\n" );
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document.write( "2. Solve by substitution or elimination method: <BR>\n" );
document.write( "        7x - 5y = 14<BR>\n" );
document.write( "             -4x + y = 27\r<BR>\n" );
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document.write( "3. Solve by substitution or elimination method: <BR>\n" );
document.write( "             -4x + 3y = 5<BR>\n" );
document.write( "              12x - 9y = -15\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 #120865 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=120865\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Can someone please help me with these. <BR>\n" );
document.write( "2. Solve by substitution or elimination method: <BR>\n" );
document.write( "7x - 5y = 14  eqn 1<BR>\n" );
document.write( "-4x + y = 27  eqn 2<BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "y = 4x+27  (from eqn 2)<BR>\n" );
document.write( "Sub into eqn 1<BR>\n" );
document.write( "7x - 5(4x+27) = 14<BR>\n" );
document.write( "7x - 20x - 135 = 14<BR>\n" );
document.write( "-13x = 149<BR>\n" );
document.write( "x = -149/13<BR>\n" );
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document.write( "y = 4x+27<BR>\n" );
document.write( "y = -596/13 + 27 = -596/13 + 351/13<BR>\n" );
document.write( "y = -245/13<BR>\n" );
document.write( "Sub to check:<BR>\n" );
document.write( "7*(-149/13) - 5*(-245/13) ?? 14<BR>\n" );
document.write( "-1043/13 + 1225/13 ?? 14<BR>\n" );
document.write( "182/13 is 14, so it checks.<BR>\n" );
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document.write( "3. Solve by substitution or elimination method: <BR>\n" );
document.write( "-4x + 3y = 5<BR>\n" );
document.write( "12x - 9y = -15 <BR>\n" );
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document.write( "Divide the 2nd eqn by -3<BR>\n" );
document.write( "-4x + 3y = 5<BR>\n" );
document.write( "That's the same as eqn 1, so there's no unique solution.  It's a straight line, or an infinite number of solutions.<BR>\n" );
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