document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=205865>Question 205865</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve by substitution method<BR>\n" );
document.write( "5x + 7y =10<BR>\n" );
document.write( "x= 5-2y\r<BR>\n" );
document.write( "\n" );
document.write( "What is the solution pair  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #155455 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=155455\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Solve by substitution method<BR>\n" );
document.write( "5x + 7y =10<BR>\n" );
document.write( "x= 5-2y <BR>\n" );
document.write( "----------<BR>\n" );
document.write( "Sub for x in 1st eqn<BR>\n" );
document.write( "5(5-2y) + 7y = 10<BR>\n" );
document.write( "25-10y + 7y = 10<BR>\n" );
document.write( "-3y = -15<BR>\n" );
document.write( "y = 5<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "x = -5<BR>\n" );
document.write( "--> (-5,5) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );