Combined, there are 202 ​Asians, Africans,​ Europeans, and Americans in a village. The number of Asians exceeds the number of Africans and Europeans by 72. The difference between the number of Europeans and Americans is 20. If the number of Africans is​ doubled, their population exceeds the number of Europeans and Americans by 30. Determine the number of​ Asians, Africans,​ Europeans, and Americans in this village

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