The Platte River is formed in western Nebraska east of the city of North Platte, Nebraska by the confluence of the North Platte and the South Platte Rivers, which both arise from snowmelt in the eastern Rockies east of the Continental Divide.\n\nAnswer this question: where do the north and south platte rivers meet?
Let's think step by step.
western Nebraska east of the city of North Platte , Nebraska
The important part for answering this question is: The Platte River is formed in western Nebraska east of the city of North Platte, Nebraska by the confluence of the North Platte and the South Platte Rivers, which both arise from snowmelt in the eastern Rockies east of the Continental Divide.

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So, the answer is western Nebraska east of the city of North Platte , Nebraska