How to determine which point to take the moment about?

[CCenturion]

Problem -

1. The T-shaped bracket shown is supported by a small wheel at E and pegs at C and D. Neglecting the effect of friction, determine the reactions at C, D, and E when the angle is 30 degrees.
   
   I have taken the moment about E, and gotten a result for all the reactions. However, in the solutions it says that i should be taking the moment about D.
   I don't understand what the difference is between picking one point or the other.
   Please refer to the two attached pictures. Thank you

 

[nasu]

See template for homework section.
You did not show neither the problem nor your solution.

 

[PhanthomJay]

Problem -

1. The T-shaped bracket shown is supported by a small wheel at E and pegs at C and D. Neglecting the effect of friction, determine the reactions at C, D, and E when the angle is 30 degrees.
   
   I have taken the moment about E, and gotten a result for all the reactions. However, in the solutions it says that i should be taking the moment about D.
   I don't understand what the difference is between picking one point or the other.
   Please refer to the two attached pictures. Thank you

For a system in equilibrium, you can sum moments about any point = 0, but you can simplify the number of steps and reduce chances for errors when summing moments about a selectively chosen point. You might want to first solve for Ex and Ey, then sum moments about D (or C) to see how this works.

 

[CCenturion]

Got it Phantom, Thanks a lot !