document.write( "Question 633941: Your friend can address envelopes twice as fast as you can. Together you and your friend address all the envelopes in 3 hours. How long would it take your friend to address the envelopes alone? \n" ); document.write( "
Algebra.Com's Answer #399687 by richwmiller(17219)\"\" \"About 
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3/x+3/y=1;
\n" ); document.write( "x=2y
\n" ); document.write( "x=9 y=9/2 =4.5 hours the friend
\n" ); document.write( "he does 2/3 and you do 1/3 of the job.
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