The force-couple system at A is to be replaced by a single equivalent force acting at a point B on the vertical edge (or its extension) of the triangular plate. Determine the distance d from point A. If d is below point A your answer will be positive, if it is above A your answer will be negative. Express the answer in general terms and then apply your answer for the case: R = 210 N, MA = 60 N·m, h = 2.3 m, b = 3.5 m.