document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=168889>Question 168889</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Using Substitution<BR>\n" );
document.write( "4x + 2y = 1<BR>\n" );
document.write( "2x + 3y = .70\r<BR>\n" );
document.write( "\n" );
document.write( "Solving for X in the first problem<BR>\n" );
document.write( "4x + 2y - 2y = 1 - 2y<BR>\n" );
document.write( "4x = 1-2y<BR>\n" );
document.write( "4x/4 = (1-2y)/4<BR>\n" );
document.write( "x = (1 - 2y)/4\r<BR>\n" );
document.write( "\n" );
document.write( "Substitute x into first equation (this is where I get lost)<BR>\n" );
document.write( "2(1-2y/4) + 3y = .70 <BR>\n" );
document.write( "the example on this website says it should be 2(1+2y)/4+3y=.70, but if x = (1-2y)/4, how can you just change it to the 1+2y?  Then also how do I solve the problem?  If you could give me step by step with explanations so I understand that would be very helpful.  This is my calculations:\r<BR>\n" );
document.write( "\n" );
document.write( "2-4y/4 + 3y = .70 (multiplied 2 by everything in parentheses)<BR>\n" );
document.write( "2-y+3y=.70 (4's cancel eachother out)<BR>\n" );
document.write( "2+2y=.70 (3y minus 1y = 2y)<BR>\n" );
document.write( "2+2y/2 = .70/2 (divide both sides by 2)<BR>\n" );
document.write( "1+y = .35<BR>\n" );
document.write( "y = .35 - 1 (subtract 1 from each side)<BR>\n" );
document.write( "y = -.65<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #124574 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=124574\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You're on the right track.<BR>\n" );
document.write( "Watch the parentheses though, they got you in trouble in the next line.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%28%281-2y%29%2F4%29+%2B+3y+=+.70 ALIGN=MIDDLE  ALT=\"2%28%281-2y%29%2F4%29+%2B+3y+=+.70\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281-2y%29%2F2%2B3y=0.70 ALIGN=MIDDLE  ALT=\"%281-2y%29%2F2%2B3y=0.70\"   DISABLED_style= \"max-width:90%; height:auto;\" >  <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281-2y%29%2B6y=1.40 ALIGN=MIDDLE  ALT=\"%281-2y%29%2B6y=1.40\"   DISABLED_style= \"max-width:90%; height:auto;\" >Multiply both sides by 2 to get rid of denominators.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2B4y=1.40 ALIGN=MIDDLE  ALT=\"1%2B4y=1.40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4y=0.40 ALIGN=MIDDLE  ALT=\"4y=0.40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=0.1 ALIGN=MIDDLE  ALT=\"y=0.1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Then from above<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=%281+-+2y%29%2F4 ALIGN=MIDDLE  ALT=\"x+=%281+-+2y%29%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%281-.2%29%2F4 ALIGN=MIDDLE  ALT=\"x=%281-.2%29%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=0.8%2F4 ALIGN=MIDDLE  ALT=\"x=0.8%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=0.2 ALIGN=MIDDLE  ALT=\"x=0.2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );