The four masses shown in the diagram are connected by massless, rigid rods. The mass of the A particle is 400 g, the mass of the B particle is 650 g, the mass of the C particle is 700 g, and the mass of the D particle is 550 g. The length of the rods is 40 cm. Consider the A particle to be the origin of the coordinate system. The x coordinate of the center of mass (in cm) is ...

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