document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=58202>Question 58202</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x+y=4<BR>\n" );
document.write( "y=2X+1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #39793 by </B><A HREF=/tutors/aboutme.mpl?userid=rcmcc><B>rcmcc(152)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rcmcc><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=rcmcc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=39793\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> solve for x and y\r<BR>\n" );
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document.write( "x+y=4<BR>\n" );
document.write( "y=2X+1\r<BR>\n" );
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document.write( "the first equation subtract x to isolate y<BR>\n" );
document.write( "y=4-x<BR>\n" );
document.write( "substitute this equation for y in the second equation\r<BR>\n" );
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document.write( "4-x=2x+1<BR>\n" );
document.write( "add x to each side<BR>\n" );
document.write( "4=3x+1<BR>\n" );
document.write( "subtract 1 from each side<BR>\n" );
document.write( "3=3x<BR>\n" );
document.write( "divide by 3 to isolate x<BR>\n" );
document.write( "x=1\r<BR>\n" );
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document.write( "now substitute 1 into the first equation to find y<BR>\n" );
document.write( "1+y=4<BR>\n" );
document.write( "subtract 1 to find y<BR>\n" );
document.write( "y=3\r<BR>\n" );
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document.write( "so x is 1 and y is 3 </SPAN>\n" );
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