document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=23545>Question 23545</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the system by substitution\r<BR>\n" );
document.write( "\n" );
document.write( "x-7y=-22\r<BR>\n" );
document.write( "\n" );
document.write( "5x+2y=1\r<BR>\n" );
document.write( "\n" );
document.write( "Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #12397 by </B><A HREF=/tutors/aboutme.mpl?userid=elima><B>elima(1433)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=elima><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=12397\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x-7y=-22<BR>\n" );
document.write( "5x+2y=1<BR>\n" );
document.write( "First we will solve eq.1 for x;<BR>\n" );
document.write( "x-7y=-22<BR>\n" );
document.write( "x=-22+7y<BR>\n" );
document.write( "Now substitute this into the other eq. for x;<BR>\n" );
document.write( "5(-22+7y)+2y=1<BR>\n" );
document.write( "-110+35y+2y=1<BR>\n" );
document.write( "-110+37y=1<BR>\n" );
document.write( "37y=1+110<BR>\n" );
document.write( "37Y=111<BR>\n" );
document.write( "Y=3<BR>\n" );
document.write( "Now that we know y, we can solve for x;<BR>\n" );
document.write( "x-7(3)=-22<BR>\n" );
document.write( "x-21=-22<BR>\n" );
document.write( "x=-1<BR>\n" );
document.write( "So we have;<BR>\n" );
document.write( "x=-1,y=3<BR>\n" );
document.write( "Hope you understand<BR>\n" );
document.write( "=)<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );