document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=64865>Question 64865</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0078603900/algebrahomeworkh>algebra 1</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> solve for x and y\r<BR>\n" );
document.write( "\n" );
document.write( "3x+1=-7y\r<BR>\n" );
document.write( "\n" );
document.write( "6x+7y=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #45537 by </B><A HREF=/tutors/aboutme.mpl?userid=ptaylor><B>ptaylor(2198)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ptaylor><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=ptaylor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=45537\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> solve for x and y <BR>\n" );
document.write( "(1)  3x+1=-7y <BR>\n" );
document.write( "(2)  6x+7y=0\r<BR>\n" );
document.write( "\n" );
document.write( "From (2), if we subtract 7y from both sides. we see that 6x=-7y or\r<BR>\n" );
document.write( "\n" );
document.write( "(2a)  -7y=6x\r<BR>\n" );
document.write( "\n" );
document.write( "substituting for -7y in (1) we get:\r<BR>\n" );
document.write( "\n" );
document.write( "3x+1=6x or subtracting 3x from both sides, we have:<BR>\n" );
document.write( "6x-3x=1<BR>\n" );
document.write( "3x=1<BR>\n" );
document.write( "x=1/3\r<BR>\n" );
document.write( "\n" );
document.write( "substituting in (2a):<BR>\n" );
document.write( "-7y=6(1/3)=2\r<BR>\n" );
document.write( "\n" );
document.write( "y=(-2/7)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "ck<BR>\n" );
document.write( "Substitute for x & y in (1):<BR>\n" );
document.write( "3x+1=-7y<BR>\n" );
document.write( "3(1/3)+1=-7(-2/7)=<BR>\n" );
document.write( "1+1=2<BR>\n" );
document.write( "2=2\r<BR>\n" );
document.write( "\n" );
document.write( "Substitute for x & y in (2):<BR>\n" );
document.write( "6x+7y=0<BR>\n" );
document.write( "6(1/3)+7(-2/7)=0<BR>\n" );
document.write( "2-2=0<BR>\n" );
document.write( "0=0\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Hope this helps.  Happy holidays------ptaylor<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );