document.write( "Question 142547: sally paints a fence in 6 hours sally and alex paint it in four hours, if alex paints it by himself how long would it take \n" ); document.write( "
Algebra.Com's Answer #103761 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! sally paints a fence in 6 hours sally and alex paint it in four hours, if alex paints it by himself how long would it take \n" ); document.write( "----------------------- \n" ); document.write( "Sally Data: \n" ); document.write( "time = 6 hrs/job ; rate = 1/6 job/hr \n" ); document.write( "---------------- \n" ); document.write( "Together Data: \n" ); document.write( "time = 4 hrs/job ; rate = 1/4 job/hr \n" ); document.write( "------------------- \n" ); document.write( "Alex DATA: \n" ); document.write( "time = x hrs/job ; rate = 1/x job/hr \n" ); document.write( "--------------------- \n" ); document.write( "EQUATION: \n" ); document.write( "rate + rate = together rate \n" ); document.write( "1/6 + 1/x = 1/4 \n" ); document.write( "Multiply thru by 12x to get: \n" ); document.write( "2x + 12 = 3x \n" ); document.write( "x = 12 hrs (time for Alex to do the job alone) \n" ); document.write( "=============== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |