document.write( "Question 264353: A painter can finish painting a house in 4 hours. Her assistant takes 6 hours to finish the same job. How long would it take for them to complete the job if they were working together? \n" ); document.write( "
Algebra.Com's Answer #194635 by Ruli(21)![]() ![]() ![]() You can put this solution on YOUR website! The painter = 1/4x \n" ); document.write( "Her assistant = 1/6x \n" ); document.write( "1/4x + 1/6x = 1 \n" ); document.write( "Multiply each side by the LCD, 12 \n" ); document.write( "12(1/4x) + 12(1/6x) = 12(1) \n" ); document.write( "3x + 2x = 12 \n" ); document.write( "5x = 12 \n" ); document.write( "Divide each side by 5 \n" ); document.write( "x = 12/5 \n" ); document.write( "Working together, the painter and her assistant can paint the house in 12/5 hr. \n" ); document.write( "check: \n" ); document.write( "1/4(12/5) + 1/6(12/5) = 1 \n" ); document.write( "12/20 + 12/30 = 1 \n" ); document.write( "36/60 + 24/60 = 1 \n" ); document.write( "60/60 = 1 \n" ); document.write( "1 = 1 \n" ); document.write( " |