Question: Solve the given systems of equations by any appropriate method. A 20-ft crane arm with a supporting cable and with a 100-lb box suspended from
Solve the given systems of equations by any appropriate method.
A 20-ft crane arm with a supporting cable and with a 100-lb box suspended from its end has forces acting on it, as shown in Fig. 5.53. Find the forces (in lb) from the following equations.

F + 2.0F = 280 0.87F, F30 3.0F - 4.0F = 600 F3- Fig. 5.53 F 8 ft F 40 lb Cable 30.0 12 ft 100 lb
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