document.write( "Question 57746This question is from textbook mcdougal littell
\n" ); document.write( ": r=ab/a+b ;a solve for a \n" ); document.write( "

Algebra.Com's Answer #39420 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
r=ab/(a+b) ;a solve for a
\n" ); document.write( "Cross-multiply to get:
\n" ); document.write( "ra+rb=ab
\n" ); document.write( "Get the \"a's' on one side:
\n" ); document.write( "ab-ra=rb
\n" ); document.write( "Factor out the \"a\" to get:
\n" ); document.write( "a(b-r)=rb
\n" ); document.write( "a=rb/(b-r)
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

\n" );