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)![]() ![]() You can put this solution on YOUR website! 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( "... \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. \n" ); document.write( ".. \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. \n" ); document.write( "... \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. \n" ); document.write( ".... \n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " |