A 31 Foot Long Lever Has a Fulcrum at a Point

Short Answer

A 31 foot long lever has a fulcrum at a point 20 feet from the left end. A 10 pound weight is suspended at the left end of the bar. A 15 pound weight is suspended 3 feet to the left of the fulcrum. An 10 pound weight is suspended from the right end of the bar. To the right of the fulcrum, how far must a 15 pound weight be suspended to balance the bar?