Lever problem - algebra (help!)?

Question

A 110 pound boy sits on a seesaw 6 feet from the fulcrum. How far from the fulcrum should an 80-pound girl sit so the seesaw is balanced?

Answer 1

I believe that it will work the same in ft-lbs as in metric. So,

(110 lbs)(6 ft)=(80 lbs)x  <==with x as unknown distance

x = 660 ft-lbs/80 lbs

x=8.25 ft