document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=161716>Question 161716</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the system of equations using the substitution method.<BR>\n" );
document.write( "If the answer is a unique solution, present it as an ordered pair: (x,y).  If not, specify whether the answer is \"no solution\" or \"infinitely many solution.\"<BR>\n" );
document.write( "7x+y=1<BR>\n" );
document.write( "3x+2y=-9  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #119182 by </B><A HREF=/tutors/aboutme.mpl?userid=nabla><B>nabla(475)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nabla><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=119182\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> from the first:<BR>\n" );
document.write( "y=1-7x\r<BR>\n" );
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document.write( "Put that y into the second equation:\r<BR>\n" );
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document.write( "3x+2(1-7x)=-9<BR>\n" );
document.write( "3x+2-14x=-9<BR>\n" );
document.write( "-11x=-11<BR>\n" );
document.write( "x=1\r<BR>\n" );
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document.write( "If x=1,<BR>\n" );
document.write( "y=1-7(1)=-6\r<BR>\n" );
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document.write( "check:<BR>\n" );
document.write( "7-6=1<BR>\n" );
document.write( "3-12=-9<BR>\n" );
document.write( "yes.<BR>\n" );
document.write( " </SPAN>\n" );
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