document.write( "Question 958982: three men A B C working together can do a job in 6 hrs less time than A alone, in 1 hr less time than B alone and in one half the time needed by C when working alone. then A and B together can do a job in ____ minutes. \n" ); document.write( "
Algebra.Com's Answer #586084 by josgarithmetic(39617)\"\" \"About 
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Let a, b, c, be the times for each to do 1 job if each alone.\r
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\n" ); document.write( "Three equations in three unknown variables. The question is to find the reciprocal of \"1%2Fa%2B1%2Fb\".\r
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\n" ); document.write( "\n" ); document.write( "Could you try using the last equation to eliminate c, and have or make a simpler system? I have not worked through this; only setup the system.
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