Please refer to the image.
Sum of clockwise moment=sum of anticlockwise moment
The Attempt at a Solution
I had drawn out the force diagram and listed out the information required.
The question asks me to find force acting by the support B.
I troubled myself by taking moments about A and multiplying every forces with their respective distances from A.
However the answer was simple, they just added all other forces together, 33 + 4.4 + 129 = 166N.
I can't figure out where is the pivot. Or is there even a pivot? What's the theory behind this calculation?