Consider the equation $5x+7y+35xy=2015$ . Suppose the number of integer solution is A with the set of integer pairs $(x_i,y_i)$ being $(x_1,y_1),(x_2,y_2),....(x_A,y_A)$ . Find $\sum_{i=1}^{A} x_i + \sum_{i=1}^{A} y_i$ .

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