document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=264208>Question 264208</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x + 14y= 84<BR>\n" );
document.write( "2x - 7y = -7<BR>\n" );
document.write( "how do i solve these equations using substation?<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 #194572 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=194572\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x + 14y= 84<BR>\n" );
document.write( "x=84-14y substitute (84-14y) for x in the other equation & solve for y.<BR>\n" );
document.write( "2x - 7y = -7 <BR>\n" );
document.write( "2(84-14)-7y=-7<BR>\n" );
document.write( "168-28y-7y=-7<BR>\n" );
document.write( "-35y=-7-168<BR>\n" );
document.write( "-35y=-175<BR>\n" );
document.write( "y=-175/-35<BR>\n" );
document.write( "y=5 ans.<BR>\n" );
document.write( "x=84-14*5<BR>\n" );
document.write( "x=84-70<BR>\n" );
document.write( "x=14 ans.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "2*14-7*5=-7<BR>\n" );
document.write( "28-35=-7<BR>\n" );
document.write( "-7=-7<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );