document.write( "Question 357292: Betty and Karen have been hired to paint the house in a new development. Working together the women can paint a house in two-thirds the lime that it takes Karen working alone. Betty takes 6h to paint a house alone. How long does it take Karen to paint a house working alone? \n" ); document.write( "
Algebra.Com's Answer #255156 by mananth(16946)\"\" \"About 
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Working together the women can paint a house in two-thirds the lime that it takes Karen working alone. Betty takes 6h to paint a house alone. How long does it take Karen to paint a house working alone?
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\n" ); document.write( "let karen take x hours to do the job alone.
\n" ); document.write( "so she does 1/x of the job in 1 hour.
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\n" ); document.write( "Betty takes 6 hours working alone
\n" ); document.write( "so she does 1/6 of the job in 1hour.
\n" ); document.write( "...
\n" ); document.write( "Both together they do 1/6 + 1/x of the job in 1 hour
\n" ); document.write( "= (x+6)/6x of the job in 1 hour.
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\n" ); document.write( "both together they take 2/3 *x = 2x/3 hours
\n" ); document.write( "or they do 3/2x of the job in 1 hour.
\n" ); document.write( "...
\n" ); document.write( "(x+6)/6x = 3/2x
\n" ); document.write( "2x(x+6)=3x
\n" ); document.write( "2x^2+12x=18x
\n" ); document.write( "2x^2= 6x
\n" ); document.write( "divide by 2x
\n" ); document.write( "x= 3
\n" ); document.write( "Karen takes 3 hours to do the job alone.
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\n" ); document.write( "m.ananth@hotmail.ca
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