document.write( "Question 395319: Jack usually mows his lawn in 3 hours. Marilyn can mow the same yard in 7 hours. How much time would it take for them to mow the lawn together? \n" ); document.write( "

Algebra.Com's Answer #280547 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Let x represent time to mow the lawn together
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document.write( "Question states***per hour being the equalizer
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document.write( " 1/3 + 1/7 = 1/x  |Multiplying each term by 21x so as alll denominators=1
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document.write( " 7x + 3x = 21
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document.write( "     10x = 21 hr 
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document.write( "       x = 2.1 hr  \n" );
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