document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=309347>Question 309347</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve using substitution method.\r<BR>\n" );
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document.write( "a - 2b = 3 <BR>\n" );
document.write( "3a = 6b + 9 <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 #221248 by </B><A HREF=/tutors/aboutme.mpl?userid=ichudov><B>ichudov(507)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ichudov><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=ichudov><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=221248\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28+%0D%0A++++++++++++a+-+2b+=+3%2C%0D%0A++++++++++++3a+=+6b+%2B+9+%0D%0A+++++++++%29%0D%0A ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "you just need to use the substitution solver<BR>\n" );
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document.write( " <TR><TD  ALIGN=MIDDLE>Solved by <A  rel=nofollow HREF=http://wiki.algebra.com/index.php/Tutoring_-_pluggable_solvers>pluggable</A> solver: <A  rel=nofollow HREF=linear_substitution.solver>SOLVE linear system by SUBSTITUTION</A></TD></TR>\n" );
document.write( "<TR><TD  ALIGN=LEFT>Solve:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+system%28+%0D%0A++++1%5Ca+%2B+-2%5Cb+=+3%2C%0D%0A++++3%5Ca+%2B+-6%5Cb+=+9+%29%0D%0A++ ALIGN=MIDDLE  ALT=\"+system%28+%0D%0A++++1%5Ca+%2B+-2%5Cb+=+3%2C%0D%0A++++3%5Ca+%2B+-6%5Cb+=+9+%29%0D%0A++\"   DISABLED_style= \"max-width:90%; height:auto;\" >We'll use substitution. After moving -2*b to the right, we get:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2Aa+=+3+-+-2%2Ab ALIGN=MIDDLE  ALT=\"1%2Aa+=+3+-+-2%2Ab\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+3%2F1+-+-2%2Ab%2F1 ALIGN=MIDDLE  ALT=\"a+=+3%2F1+-+-2%2Ab%2F1\"   DISABLED_style= \"max-width:90%; height:auto;\" >. Substitute that<BR>\n" );
document.write( "  into another equation:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%2A%283%2F1+-+-2%2Ab%2F1%29+%2B+-6%5Cb+=+9 ALIGN=MIDDLE  ALT=\"3%2A%283%2F1+-+-2%2Ab%2F1%29+%2B+-6%5Cb+=+9\"   DISABLED_style= \"max-width:90%; height:auto;\" > and simplify: So, we know that b=0=0. Since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+3%2F1+-+-2%2Ab%2F1 ALIGN=MIDDLE  ALT=\"a+=+3%2F1+-+-2%2Ab%2F1\"   DISABLED_style= \"max-width:90%; height:auto;\" >, a=3.<BR>\n" );
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document.write( "  Answer: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28+a=3%2C+b=0=0+%29 ALIGN=MIDDLE  ALT=\"system%28+a=3%2C+b=0=0+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
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