Question 177414
melanie can paint 1/x of the barn per day
melissa can paint 1/2x of the barn per day
:
together they can do 
:
a){{{(1/x)+(1/2x)}}}per day
:
{{{(2/2x)+(1/2x)=3/2x}}}per day
:
b){{{3/2(5)=3/10}}}