In this case, since it is a 1D vector. It is simple to find the net force of the object. To find the net force, you need to add up both of the forces together. Meaning this case, we can make right positive and left negative so it would be.
Fnet = 50N + (-20N)
Fnet = 30N to the right.
It would be to the right because the value is still positive.
