Question 164325
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
 fractions of the barn that they complete in one day by working together.
:
Mela: {{{1/x}}}
Meli: {{{1/(2x)}}}
:
{{{1/x}}} + {{{1/(2x)}}}
:
 Evaluate the expression for x = 5.
:
{{{1/5}}} + {{{1/10}}} = {{{3/10}}} of the job done in 1 day together