document.write( "Question 1067716: Show algebraically that the proportion a-b/b = c-d/d AND a/b = c/d are equivalent \n" ); document.write( "

Algebra.Com's Answer #682823 by Boreal(15235) $\"\"$ $\"About$

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(a-b)/b=(c-d)/d
\n" ); document.write( "(a/b)-1=(c/d)-1
\n" ); document.write( "add 1 to both sides
\n" ); document.write( "(a/b)=(c/d) \n" ); document.write( "

\n" );