document.write( "Question 388900: It takes josh 2/3 as long as it takes beth to paint a wall. if together josh and beth would take 12 hours, how long would it take beth to do the work alone? \n" ); document.write( "
Algebra.Com's Answer #275306 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! It takes josh 2/3 as long as it takes beth to paint a wall. if together josh and beth would take 12 hours, how long would it take beth to do the work alone? \n" ); document.write( "---------------------- \n" ); document.write( "Let Beth time be \"x\"; her rate is 1/x job/hr \n" ); document.write( "Then Josh time is (2x)/3 ; his rate is 3/(2x) job/hr \n" ); document.write( "====== \n" ); document.write( "Together time = 12 hrs; their rate = 1/12 job/hr \n" ); document.write( "========================= \n" ); document.write( "Equation: \n" ); document.write( "rate + rate = together rate \n" ); document.write( "1/x + 3/(2x) = 1/12 \n" ); document.write( "--- \n" ); document.write( "Multiply thru by 12x: \n" ); document.write( "12 + 18 = x \n" ); document.write( "x = 30 hrs: Beth's time to do the job. \n" ); document.write( "(2/3)x = 20 hrs; Josh's time to do the job. \n" ); document.write( "=========================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |