document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=98949>Question 98949</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find two numbers with a sum of 15 and a differnce of 4. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #72019 by </B><A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><B>tutorcecilia(2152)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><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=tutorcecilia><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=72019\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x+y=15<BR>\n" );
document.write( "x-y=4<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Solving using the substitute method:<BR>\n" );
document.write( "x+y=15<BR>\n" );
document.write( "x=-y+15<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Substitute (x=-y+15) back into the second equation and solve for the y-term<BR>\n" );
document.write( "x-y=4<BR>\n" );
document.write( "(-y+15)-y=4<BR>\n" );
document.write( "-2y+15=4<BR>\n" );
document.write( "-2y=-15+4<BR>\n" );
document.write( "-2y=-11<BR>\n" );
document.write( "y=11/2<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Solve for the x-term by substituting (y=11/2) back into either equation and solve for the x-term:<BR>\n" );
document.write( "x-y=4<BR>\n" );
document.write( "x-(11/2)=4<BR>\n" );
document.write( "x=4+11/2<BR>\n" );
document.write( "x=19/2<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Checking:<BR>\n" );
document.write( "x-y=4<BR>\n" );
document.write( "(19/2)-(11/2)=4<BR>\n" );
document.write( "8/2=4<BR>\n" );
document.write( "4=4 [checks out]<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );