document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=258384>Question 258384</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the equations by substitution.\r<BR>\n" );
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document.write( "7 + 2y = 8x<BR>\n" );
document.write( "3x - 2y = 0\r<BR>\n" );
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document.write( "x = ?<BR>\n" );
document.write( "y = ?\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 #190327 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=190327\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 7+2y=8x<BR>\n" );
document.write( "8x+2y=-7<BR>\n" );
document.write( "3x-2y=0<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "11x=-7<BR>\n" );
document.write( "x=-7/11 ans.<BR>\n" );
document.write( "3*-7/11-2y=0<BR>\n" );
document.write( "-21/11-2y=0<BR>\n" );
document.write( "-2y=21/11<BR>\n" );
document.write( "y=(21/11)/-2<BR>\n" );
document.write( "y=21/11*-1/2<BR>\n" );
document.write( "y=-21/22 ans.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "7+2*-21/22=8*-7/11<BR>\n" );
document.write( "7-21/11=-56/11<BR>\n" );
document.write( "77/11-21/11=-56/11<BR>\n" );
document.write( "-56/11=-56/11\r<BR>\n" );
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