A marble block of mass m1 = 567.1kg and a granite block of mass m2 = 266.4 kg are connected to each other by a rope that runs over a pulley, as shown in the figure. Both blocks are located on inclined planes, with angles α = 39.3° and β = 53.2°. Both blocks move without friction, and the rope glides over the pulley without friction. What is the acceleration of the marble block? Note that the positive x- direction is indicated in the figure.

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