document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=138326>Question 138326</A>: <I><SPAN STYLE=\"word-break: break-all;\"> X-4Y=1<BR>\n" );
document.write( "4X+Y=21 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #101019 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=101019\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> X-4Y=1<BR>\n" );
document.write( "4X+Y=21<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "Multiply thru the 1st equation by 4 to get:<BR>\n" );
document.write( "4x-16y = 4<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Subtract that from the 2nd equation to get:<BR>\n" );
document.write( "17y = 17<BR>\n" );
document.write( "y = 1<BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "Substitute that into x-4y=1 to solve for x:<BR>\n" );
document.write( "x-4*1 = 1<BR>\n" );
document.write( "x = 5<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "Final Answer: x=5,y=1<BR>\n" );
document.write( "==========================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );