Question 203561
If Melanie can paint the barn in x days, then she can paint {{{1/x}}} of the barn in 1 day.
If Melissa can paint the barn in 2x days, then she can paint {{{1/2x}}} of the barn in 1 day.
Working together, they can paint {{{highlight(1/x + 1/2x = 3/2x)}}} of the barn in 1 day.
If x = 5, then:
{{{3/2x = 3/(2(5))}}}={{{highlight(3/10 = 0.3)}}}