document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=82405>Question 82405</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the system by addition or substitution.<BR>\n" );
document.write( "	–6x + 3y = 12<BR>\n" );
document.write( "	y = 2x + 3 <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #59249 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley75><B>checkley75(3666)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley75><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=59249\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y=2x+3 now substitute (2x+3) for y in the other equation & solve for x.<BR>\n" );
document.write( "-6x+3(2x+3)=12<BR>\n" );
document.write( "-6x+6x+9=12<BR>\n" );
document.write( "0x=12-9<BR>\n" );
document.write( "0=3 now common solution here.<BR>\n" );
document.write( "proof we plot the 2 lines<BR>\n" );
document.write( "y=2x+3 (red line) &<BR>\n" );
document.write( "3y=6x+12, y=6x/3+12/3, y=2x+4 (green line)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+y+=+2x+%2B3%2C+y+=+2x+%2B4%29+ ALIGN=MIDDLE  ALT=\"+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+y+=+2x+%2B3%2C+y+=+2x+%2B4%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = 2x +3 and y = 2x +4). \r<BR>\n" );
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