document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=14393>Question 14393</A>: <I><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%283a-12b%2Bc%29-%286a%2B20b-3c%29 ALIGN=MIDDLE  ALT=\"%283a-12b%2Bc%29-%286a%2B20b-3c%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "i can not understand what i am doin wrong in this prob..<BR>\n" );
document.write( "i took the paren. away..<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3a-12b%2Bc-6a%2B20b-3c ALIGN=MIDDLE  ALT=\"3a-12b%2Bc-6a%2B20b-3c\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "then i multiplied everything in the secon par. by 1 and changed the signs...<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3a-12b%2Bc-6a-20b%2B3c ALIGN=MIDDLE  ALT=\"3a-12b%2Bc-6a-20b%2B3c\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "then i combined like terms...<BR>\n" );
document.write( "i got the answer<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3a-8b%2B4c ALIGN=MIDDLE  ALT=\"3a-8b%2B4c\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "now i know that it was wrong cause my teacher told me that it was...but can you please help me to beter under stand this?<BR>\n" );
document.write( "thanks<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 #7208 by </B><A HREF=/tutors/aboutme.mpl?userid=elima><B>elima(1433)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=elima><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=7208\">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=%283a-12b%2Bc%29-%286a%2B20b-3c%29 ALIGN=MIDDLE  ALT=\"%283a-12b%2Bc%29-%286a%2B20b-3c%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3a-12b%2Bc-6a-20b%2B3c ALIGN=MIDDLE  ALT=\"3a-12b%2Bc-6a-20b%2B3c\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3a-8b%2B4c ALIGN=MIDDLE  ALT=\"3a-8b%2B4c\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Why did you subtract the -12b and the -20b?<BR>\n" );
document.write( "You need to remember they are both negative numbers, so you will actually add them and keep the negative sign.<BR>\n" );
document.write( "=) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );