6 + ___ = 12, 4 + ___ = 7, 5 + ___ = 15, 7 + ___ = 17, 3 + ___ = 8, 2 + ___ = 10, 4 + ___ = 11, ___ + 7 = 18, ___ + 6 = 14, ___ + 8 = 17, ___ + 5 = 13, ___ + 7 = 18, ___ + 6 = 13, ___ + 3 = 14, ___ + 10 = 19, ___ + 8 = 12.

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