document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=203071>Question 203071</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If X-3Y=8 and Y=2x+1; X=? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #153191 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=153191\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (1) x-3y=8<BR>\n" );
document.write( "(2) y=2x+1<BR>\n" );
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document.write( "subst  (2) into (1)<BR>\n" );
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document.write( "x-3(2x+1) =8<BR>\n" );
document.write( "x-6x -3 =8<BR>\n" );
document.write( "-5x=11<BR>\n" );
document.write( "x=-11/5<BR>\n" );
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document.write( "y= 2(-11/5) +1<BR>\n" );
document.write( "y=-22/5 +5/5<BR>\n" );
document.write( "y=-17/5<BR>\n" );
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document.write( "check,,,(1) (-11/5) -3(-17/5) =8<BR>\n" );
document.write( "-11/5 + 51/5 = 40/5 =8,,,,ok<BR>\n" );
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document.write( "(2) -17/5 =2(-11/5) +1<BR>\n" );
document.write( "-17/5 = -22/5 +5/5 = -17/5,,,,ok<BR>\n" );
document.write( " </SPAN>\n" );
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