Replace the force system acting on the frame by an equivalent resultant force and specify where the resultant's line of action intersects member AB, measured from point A. Given: F1 = 35 lb a = 2 ft...

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Replace the force system acting on the frame by an equivalent resultant force and specify where the resultant's line of action intersects member AB, measured from point A.
Given:
F1 = 35 lb a = 2 ft
F2 = 20 lb b = 4 ft
F3 = 25 lb c = 3 ft
? = 30 deg d = 2 ft