In the figure above, the teeter-totter is in static equilibrium.
A block of mass n1 is located 5 meters to the left of the fulcrum.
A block of mass n2 is located 4 meters to the right of the fulcrum.
A block of mass n3 is located 2 meters to the right of the fulcrum.
Each mass value has the same units, and the fulcrum is in the center of the
teeter-totter. What is the value of n3?
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