document.write( "Question 645442: Solve (1/a)-(2/b)=(3/c) for b. \n" ); document.write( "
Algebra.Com's Answer #405466 by sachi(548)\"\" \"About 
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(1/a)-(2/b)=(3/c)
\n" ); document.write( "or (1/a)-(3/c)=(2/b)
\n" ); document.write( "or (1*c-3*a)/ac=2/b
\n" ); document.write( "or b=2/[(1*c-3*a)/ac]=2ac/(c-3a)
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