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甲、乙两数的和是36,乙、丙两数的和是27,甲、丙两数的和是23。那么,甲、乙、丙三数之和是多少?
A, B and the sum of two is 36, B, C and the sum of the two is 27, A, C and the sum of the two is 23. So, A, B, C is the sum of the number of three?