The picture attached represents the traffic entering and leaving a "roundabout" road junction.  Such junctions are very common in Europe.  Construct a system of equations that describes the flow of traffic along the various branches.  What is the minimum flow possible along the branch BC?  What are the other flows at that time? (units are vehicles per hour.)

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A: Or, take x2 = k Hence, solution of the system is x1 = 1+2k, x2 = k, x3 = 1, x4 = 2

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Q: 200 B

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