document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1036650>Question 1036650</A>: <I><SPAN STYLE=\"word-break: break-all;\"> My teacher asked me this question<BR>\n" );
document.write( "3x + 5y = 4<BR>\n" );
document.write( "2x + 4y = 6\r<BR>\n" );
document.write( "\n" );
document.write( "She said I could use either substitution or elimination. I want to show both, can you help me solve this equation using both substitution and elimination (separately) ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #651374 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=651374\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 3x + 5y = 4<BR>\n" );
document.write( "2x + 4y = 6 <BR>\n" );
document.write( "=========<BR>\n" );
document.write( "6x+10y=8<BR>\n" );
document.write( "-6x-12y=-18<BR>\n" );
document.write( "-2y=-10<BR>\n" );
document.write( "y=5<BR>\n" );
document.write( "2x+20=6<BR>\n" );
document.write( "2x=-14<BR>\n" );
document.write( "x=-7<BR>\n" );
document.write( "(-7.5)<BR>\n" );
document.write( "Check with substitution<BR>\n" );
document.write( "====================<BR>\n" );
document.write( "2x+4y=6<BR>\n" );
document.write( "2x=-4y+6<BR>\n" );
document.write( "x=-2y+3<BR>\n" );
document.write( "substitute into first equation<BR>\n" );
document.write( "3(-2y+3)+5y=4<BR>\n" );
document.write( "-6y+9+5y=4<BR>\n" );
document.write( "-y=-5<BR>\n" );
document.write( "y=5<BR>\n" );
document.write( "x will be -7.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );