5 - 3 = X, X = 2, 10 - 5 = X, X = 5, 5 - 5 = X, X = 0, 3 - 2 = X, X = 1, 6 - 3 = X, X = 3, 8 - 4 = X, X = 4, 10 - 4 = X, X = 6.

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