Question 113996
 Melanie can paint a certain barn by herself in x days. Her helper Melissa can paint the same barn by herself in 2x days. Write a rational expression for the fraction of the barn that they complete in one day by working together.
:
One day working together:
{{{1/x}}} + {{{1/(2x)}}} = {{{((2 + 1))/(2x)}}} = {{{3/((2x))}}}
:
Evaluate the expression for x = 5:
{{{3/((2*5))}}} = {{{3/10}}} of the barn painted in 1 day working together