A 50 foot see-saw has 4 kids sitting on it. A 62 lb. girl sits on the left end, with a 76 lb. girl sitting 2.5 feet in front of her. On the right side, a 96 lb. boy sits on the end and has another boy sitting 2.5 feet in front of him. How much does this other boy weigh?

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asked by Marina
  1. balance the torques.

    62(25) + 76(25-2) = 96(25) + x(25-2.5)

    Now just solve for x

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