120(8)= 960 = 12X
X = 960/12 = 80 pounds for Tom sitting 12 feet from the fulcrum
80(12) = 120(8)
120(8)= 960 = 12X
X = 960/12 = 80 pounds for Tom sitting 12 feet from the fulcrum
80(12) = 120(8)
120*8=12*x. (20-8=12)
when you solve this; x=80
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