<PRE><B>Question 1030790</B>
Aaron mows the lawn in 5 hours, so he does 1/5 of the job per hour.  Let x be the number of hours Rosa takes to mow the lawn, then
:
1/5 + 1/x = 1/3
:
multiply both sides of the = by 15x
:
3x + 15 = 5x
:
2x = 15
:
x = 7.5
:
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It takes Rosa 7 1/2 hours to mow the lawn
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:
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