document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=21437>Question 21437</A>: <I><SPAN STYLE=\"word-break: break-all;\">  b + a      1<BR>\n" );
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document.write( "  ab        f\r<BR>\n" );
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document.write( "solve for b.<BR>\n" );
document.write( "this is a proportion b+a over ab equals 1 over f.<BR>\n" );
document.write( "after cross product i dont know how to get the b by it's self. I have been given the answer but dont know how to get there...\r<BR>\n" );
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document.write( "the answer is b= fa over a-f<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 #10340 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=10340\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve for b:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28b%2Ba%29%2Fab+=+1%2Ff ALIGN=MIDDLE  ALT=\"%28b%2Ba%29%2Fab+=+1%2Ff\"   DISABLED_style= \"max-width:90%; height:auto;\" > Multiply both sides by ab.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%2Bb+=+ab%2Ff ALIGN=MIDDLE  ALT=\"a%2Bb+=+ab%2Ff\"   DISABLED_style= \"max-width:90%; height:auto;\" > Multiply both sides by f.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=af+%2B+bf+=+ab ALIGN=MIDDLE  ALT=\"af+%2B+bf+=+ab\"   DISABLED_style= \"max-width:90%; height:auto;\" > Subtract bf from both sides.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=af+=+ab+-+bf ALIGN=MIDDLE  ALT=\"af+=+ab+-+bf\"   DISABLED_style= \"max-width:90%; height:auto;\" > Factor b from the right side.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=af+=+b%28a-f%29 ALIGN=MIDDLE  ALT=\"af+=+b%28a-f%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Divide both sides by (a-f).<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=af%2F%28a-f%29+=+b ALIGN=MIDDLE  ALT=\"af%2F%28a-f%29+=+b\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=fa%2F%28a-f%29 ALIGN=MIDDLE  ALT=\"fa%2F%28a-f%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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