document.write( "Question 147102: Please help me to solve this word problem step by step.
\n" ); document.write( "(((Sally runs the family farm in Boone, Iowa, She can plow the fields of the farm in 20hrs. Her daughter Brenda can plow the fields of the farm in 30hrs. If they have identical tractors, how long would it take Brenda and Sally to plow the fields of the farm if they worked together?))) \n" ); document.write( "

Algebra.Com's Answer #107441 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
(1 field)/(Sally's time) + (1 field)/(Brenda's time) = (1 field)/(time together)
\n" ); document.write( " $\"1%2F20+%2B+1%2F30+=+1%2Fx\"$
\n" ); document.write( "Multiply both sides by $\"60x\"$
\n" ); document.write( " $\"3x+%2B+2x+=+60\"$
\n" ); document.write( " $\"5x+=+60\"$
\n" ); document.write( " $\"x+=+12\"$
\n" ); document.write( "Working together, they can plow the field in $\"12\"$ hrs \n" ); document.write( "

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