I needed help on how to do it step-by-step to get the answer I don't understand the concept

mynics 12 Concurrent Forces and Equilibrium Send-In Assignment On-Line Course 9. Examine the frictionless pulley system to the right, with one pulley attached to the ceiling while the other is free to move fixed along the cable. 0 =? pulley What will the unknown angle 0be once the pulley system to the right is in static equilibrium? 87 kg 12 kg