What is the tension of each wire?

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To determine the tension in each wire supporting a 12-meter scaffold with a 300 Newton box placed 3 meters from the left end, the system must be analyzed under the conditions of equilibrium. The net force acting on the scaffold must equal zero, and the net torque about any axis must also equal zero. The center of mass of the scaffold will be influenced by the distribution of tension in the wires. Calculating the tensions requires careful consideration of the forces and torques involved, and using established methods, such as Doc Al's approach, can simplify the process. Accurate calculations will yield the tension values for each wire.
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a massless scaffold is held up by a wire at each end. the scaffold is 12 meters long. a 300 Newton box sits 3 meters from the left end. what is the tension of each wire? please help
 
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Identify all the forces acting on the scaffold. Since the scaffold is in equilibrium:
(1) The net force on it must be zero
(2) The net torque about any axis must be zero (use an end as the axis)
 
Neglecting torque, the scaffold's center of mass will be proportionaly distanced in accordance to the tension on each string. This is a rather hairy calculation, so I would advise the use of Doc Al's method if you are familiar with how to calculate torque.
 

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