document.write( "Question 212049: brandon can shovel his sidewalk in 8 minutes nad his brother can shovel the sidewalk in 12 minutes. if they work together, how long will it take them to shovel the sidewalk? \n" ); document.write( "
Algebra.Com's Answer #160136 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! brandon can shovel his sidewalk in 8 minutes nad his brother can shovel the sidewalk in 12 minutes. if they work together, how long will it take them to shovel the sidewalk? \n" ); document.write( "-------------------------- \n" ); document.write( "Brandon rate = 1/8 job/min \n" ); document.write( "---------------------- \n" ); document.write( "Brother rate = 1/12 job/min \n" ); document.write( "-------------------------------- \n" ); document.write( "Together rate = 1/x job/min \n" ); document.write( "Equation: \n" ); document.write( "1/8 + 1/12 = 1/x \n" ); document.write( "Multiply thru by 24x to get: \n" ); document.write( "3x + 2x = 12 \n" ); document.write( "5x = 12 \n" ); document.write( "x = 2.4 minutes (time required when they work together) \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |