document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=5473>Question 5473</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i'm not quite sure how to solve this using substitution.<BR>\n" );
document.write( "y=4x<BR>\n" );
document.write( "x+y=5\r<BR>\n" );
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document.write( "I got(1/4,1) but i'm not quite sure if thats the right answer. <BR>\n" );
document.write( "Also, does the system have exactly one solution, or more?<BR>\n" );
document.write( "Thanks for helping me! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #2853 by </B><A HREF=/tutors/aboutme.mpl?userid=Abbey><B>Abbey(339)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Abbey><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=2853\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> if y=4x, then substitute this into the second equation:<BR>\n" );
document.write( "x+(y)=5<BR>\n" );
document.write( "x+(4x)=5<BR>\n" );
document.write( "5x=5<BR>\n" );
document.write( "x=1\r<BR>\n" );
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document.write( "If x=1, then <BR>\n" );
document.write( "y=4*1 or 4<BR>\n" );
document.write( "the solution set is verified by testing these numbers in the other equation:<BR>\n" );
document.write( "x+y=5<BR>\n" );
document.write( "1+4=5  this is true so the answer has one solution:<BR>\n" );
document.write( "(1,4)\r<BR>\n" );
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document.write( "The answer is put into parentheses, because we are talking about a point on a graph - where do these two lines cross?  The answer is (1,4) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );