physics
posted by I need help .
Persons A and B are standing on a board of uniform linear density that is balanced on two supports, as shown in the figure. What is the maximum distance x from the right end of the board at which person A can stand without tipping the board? Treat persons A and B as point masses. The mass of person B is twice that of person A, and the mass of the board is half that of person A. Give your answer in terms of L, the length of the board.

Without a diagram, it cannot be figured.

it's not 3/4L or 1/4L

5/8L is the answer for future students who is taking physic class. yw