document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=287764>Question 287764</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2x-5y=7<BR>\n" );
document.write( "8=x-4y\r<BR>\n" );
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document.write( "I have to solve using substitution. My answer is (20,3)which means x=20 and y=3. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #208525 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=208525\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2x-5y=7<BR>\n" );
document.write( "8=x-4y --> x = 4y + 8<BR>\n" );
document.write( "Sub for x into 1st eqn:<BR>\n" );
document.write( "2(4y+8) - 5y = 7<BR>\n" );
document.write( "8y+16 - 5y = 7<BR>\n" );
document.write( "3y = -9<BR>\n" );
document.write( "y = -3<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "x = -4<BR>\n" );
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document.write( "I have to solve using substitution. My answer is (20,3)which means x=20 and y=3.<BR>\n" );
document.write( "Check (20,3)<BR>\n" );
document.write( "2x-5y=7<BR>\n" );
document.write( "2*20 - 5*3 =? 7<BR>\n" );
document.write( "It doesn't.<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "It's (-4,-3)<BR>\n" );
document.write( " </SPAN>\n" );
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