document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=585228>Question 585228</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve:  (2m-9)(6+5m)=(10m+15)(m-2)\r<BR>\n" );
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document.write( "I am not understanding how to do these! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #373222 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=373222\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> All you have to know is this general idea:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+a+%2B+b+%29%2A%28+c+%2B+d+%29+=+a%2Ac+%2B+b%2Ac+%2B+a%2Ad+%2B+b%2Ad+ ALIGN=MIDDLE  ALT=\"+%28+a+%2B+b+%29%2A%28+c+%2B+d+%29+=+a%2Ac+%2B+b%2Ac+%2B+a%2Ad+%2B+b%2Ad+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Practice this:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8%2A11+=+88+ ALIGN=MIDDLE  ALT=\"+8%2A11+=+88+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now write it this way:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+6+%2B+2+%29%2A%28+7+%2B+4+%29+ ALIGN=MIDDLE  ALT=\"+%28+6+%2B+2+%29%2A%28+7+%2B+4+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now do what I did above:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+42+%2B+14+%2B+24+%2B+8+ ALIGN=MIDDLE  ALT=\"+42+%2B+14+%2B+24+%2B+8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Do the addition:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+42+%2B+14+%2B+24+%2B+8+=+88+ ALIGN=MIDDLE  ALT=\"+42+%2B+14+%2B+24+%2B+8+=+88+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "It's the same as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8%2A11+=+88+ ALIGN=MIDDLE  ALT=\"+8%2A11+=+88+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "Now do it a little differently<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+7+%2B+1+%29%2A%28+3+%2B+8+%29+=+21+%2B+3+%2B+56+%2B+8+ ALIGN=MIDDLE  ALT=\"+%28+7+%2B+1+%29%2A%28+3+%2B+8+%29+=+21+%2B+3+%2B+56+%2B+8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+21+%2B+3+%2B+56+%2B+8+=+88+ ALIGN=MIDDLE  ALT=\"+21+%2B+3+%2B+56+%2B+8+=+88+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "Once you are good at this, you can do<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+2m+-+9+%29%2A%28+6+%2B+5m+%29+ ALIGN=MIDDLE  ALT=\"+%28+2m+-+9+%29%2A%28+6+%2B+5m+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+12m+-+54+%2B+10m%5E2+-+45m+ ALIGN=MIDDLE  ALT=\"+12m+-+54+%2B+10m%5E2+-+45m+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-------<BR>\n" );
document.write( "You can check this. Make <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+m+=+3+ ALIGN=MIDDLE  ALT=\"+m+=+3+\"   DISABLED_style= \"max-width:90%; height:auto;\" > or any number<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%282%2A3+-+9+%29%2A%28+6+%2B+5%2A3+%29+ ALIGN=MIDDLE  ALT=\"+%282%2A3+-+9+%29%2A%28+6+%2B+5%2A3+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+6+-+9+%29%2A%28+6+%2B+15+%29+=+-3%2A21+ ALIGN=MIDDLE  ALT=\"+%28+6+-+9+%29%2A%28+6+%2B+15+%29+=+-3%2A21+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+-3%2A21+=+-63+ ALIGN=MIDDLE  ALT=\"+-3%2A21+=+-63+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now go back to<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+2m+-+9+%29%2A%28+6+%2B+5m+%29+=+12m+-+54+%2B+10m%5E2+-+45m+ ALIGN=MIDDLE  ALT=\"+%28+2m+-+9+%29%2A%28+6+%2B+5m+%29+=+12m+-+54+%2B+10m%5E2+-+45m+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+12m+-+54+%2B+10m%5E2+-+45m+=+12%2A3+-+54+%2B+10%2A3%5E2+-+45%2A3+ ALIGN=MIDDLE  ALT=\"+12m+-+54+%2B+10m%5E2+-+45m+=+12%2A3+-+54+%2B+10%2A3%5E2+-+45%2A3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+36+-+54+%2B+90+-+135+ ALIGN=MIDDLE  ALT=\"+36+-+54+%2B+90+-+135+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+126+-+189+=+-63+ ALIGN=MIDDLE  ALT=\"+126+-+189+=+-63+\"   DISABLED_style= \"max-width:90%; height:auto;\" > ( the same answer )<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "Just practice, practice, and do this number substitution<BR>\n" );
document.write( "to check results<BR>\n" );
document.write( "Hope this helps </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );