Solve for y.
xy + p = 5
y = 5 - p - x
y = (5 - p)/x
y = 5 - px

The answer to your question is:  the second option  y = (5-p)/x

Step-by-step explanation:

Solve for y

                    xy + p = 5              Equation

                    xy = 5 -p                pass p to the right side, subtracting

                    y = (5 -p)/x             pass x to the right side, dividing