document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=5474>Question 5474</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i'm not quite sure how to solve this using substitution.<BR>\n" );
document.write( "y=7-x<BR>\n" );
document.write( "y-x=3\r<BR>\n" );
document.write( "\n" );
document.write( "I got(2,9) but i'm not quite sure if thats the right answer. <BR>\n" );
document.write( "Also, does the system have exactly one solution, or more?<BR>\n" );
document.write( "Thanks for helping me! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #310428 by </B><A HREF=/tutors/aboutme.mpl?userid=solver15><B>solver15(27)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver15><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=solver15><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=310428\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y=7-x<BR>\n" );
document.write( "y-x=3 <BR>\n" );
document.write( "(7-x)-x=3<BR>\n" );
document.write( "7-x-x=3<BR>\n" );
document.write( "7-2x=3<BR>\n" );
document.write( "-7   -7<BR>\n" );
document.write( "-2x/-2=-4/-2<BR>\n" );
document.write( "x=2<BR>\n" );
document.write( "then plug it back in to previous equation<BR>\n" );
document.write( "y=7-(2)<BR>\n" );
document.write( "y=7-2<BR>\n" );
document.write( "y=5<BR>\n" );
document.write( "=(2,5)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );