document.write( "Question 921772: Working together, Verna and Sam can paint their living room in 2 hours. Working alone, it would take Sam 3 hours longer than Verna to paint the living room. How long would it take Verna to paint the living room working by herself? \n" ); document.write( "
Algebra.Com's Answer #559192 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Working together, Verna and Sam can paint their living room in 2 hours. Working alone, it would take Sam 3 hours longer than Verna to paint the living room. How long would it take Verna to paint the living room working by herself? \n" ); document.write( "================= \n" ); document.write( "Together rate:: 1/2 job/hr \n" ); document.write( "Verna rate:: 1/x job/hr \n" ); document.write( "Sam rate:: 1/(x+3) job/hr \n" ); document.write( "------ \n" ); document.write( "Equation: \n" ); document.write( "rate + rate = together rate \n" ); document.write( "1/x + 1/(x+3) = 1/2 \n" ); document.write( "----- \n" ); document.write( "2(x+3) + 2x = x(x+3) \n" ); document.write( "4x + 6 = x^2 + 3x \n" ); document.write( "x^2 - x - 6 = 0 \n" ); document.write( "--- \n" ); document.write( "Factor: \n" ); document.write( "(x-3)(x+2) = 0 \n" ); document.write( "Positive solution:: \n" ); document.write( "x = 3 (Verna's time to do the job alone) \n" ); document.write( "x+3 = 6 (Sam's time to do the job alone) \n" ); document.write( "--------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "----------------- \n" ); document.write( " |