? + 3 = 10, 2, 6, 7, 9, 4 + ? = 5, 1, 3, 4, 7, ? + 7 = 11, 4, 5, 8, 9, 1 + ? = 20, 9, 17, 19, 20, 2 + ? = 8, 5, 6, 8, 10, ? + 7 = 10, 2, 3, 4, 12, ? + 5 = 5, 0, 3, 7, 9, ? + 9 = 15, 2, 6, 7, 9, ? + 4 = 18, 13, 14, 17, 20, ? + 1 = 15, 8, 12, 14, 16, 6 + ? = 7, 1, 2, 9, 14, ? + 1 = 18, 8, 12, 15, 17, ? + 5 = 9, 2, 3, 4, 17, 3 + ? = 6, 1, 3, 4, 5, ? + 11 = 11, 0, 3, 4, 7

missing number) - 20

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