document.write( "Question 133951: A,B and C can finish a job in 6 days. If B and C work together,the job will take 9 days, if A anc C work alone the job will take 8 days. In how many days each man working alone do the job? Thank you.
\n" ); document.write( "This is what I have so far
\n" ); document.write( "1/x + 1/y + 1/z = 1/6
\n" ); document.write( "1/y + 1/z = 1/9
\n" ); document.write( "1/x + 1/z = 1/8
\n" ); document.write( "This is where I got lost
\n" ); document.write( "Help please thank you
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Algebra.Com's Answer #97938 by scott8148(6628)\"\" \"About 
You can put this solution on YOUR website!
you have the right equations...just substitute\r
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\n" ); document.write( "\n" ); document.write( "substituting 2nd equation into 1st __ 1/x+1/9=1/6
\n" ); document.write( "__ multiplying by 18x __ 18+2x=3x __ 18=x\r
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\n" ); document.write( "\n" ); document.write( "substituting 3rd equation into 1st __ 1/y+1/8=1/6
\n" ); document.write( "__ multiplying by 24y __ 24+3y=4y __ 24=y\r
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\n" ); document.write( "\n" ); document.write( "substituting __ 1/18+1/24+1/z=1/6
\n" ); document.write( "__ multiplying by 72z __ 4z+3z+72=12z __ 72=5z __ 14.4=z
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