document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=443936>Question 443936</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with substitution method !!<BR>\n" );
document.write( "3(2x+y)=4x+20<BR>\n" );
document.write( "x-2y=3 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #306135 by </B><A HREF=/tutors/aboutme.mpl?userid=chriswen><B>chriswen(106)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=chriswen><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=306135\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 3(2x+y)=4x+20 ...(i)<BR>\n" );
document.write( "x-2y=3 ...(ii)<BR>\n" );
document.write( "x=3+2y ...(iii)<BR>\n" );
document.write( "...<BR>\n" );
document.write( "Substitute x=3+2y(iii) into (i)<BR>\n" );
document.write( "...<BR>\n" );
document.write( "3[2(3+2y)+y]=4(3+2y)+20 ... (iv)<BR>\n" );
document.write( "3(6+4y+y)=12+8y+20<BR>\n" );
document.write( "3(6+5y)=32+8y<BR>\n" );
document.write( "18+15y=32+8y<BR>\n" );
document.write( "15y-8y=32-18<BR>\n" );
document.write( "7y=14<BR>\n" );
document.write( "y=14/7<BR>\n" );
document.write( "y=2 ...(v)<BR>\n" );
document.write( "...<BR>\n" );
document.write( "substitute y=2(v) into (iii)<BR>\n" );
document.write( "...<BR>\n" );
document.write( "x=3+2(2) ...(vi)<BR>\n" );
document.write( "x=3+4<BR>\n" );
document.write( "x=7<BR>\n" );
document.write( "...<BR>\n" );
document.write( "Therefore, x=7 and y=2. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );