Hi thanks for your help.
I am guessing the other arrow would be at the same level as arrow B but right instead of left?
So
B Y
<-----------|||||----------->
I really am pretty useless so I'm probably wrong.
I am trying to determine force X
I know it is the principle of moments so I think you use this equarion - not sure though:
In equilibrium
(the sum of)anticlockwise moments = (the sum of) clockwise moments...