Distance, rate, time problem

A train travels 250 miles at a constant speed (x), in miles per hour.
Enter an equation that can be used to find the speed of the train, if the time to travel 250 miles is 5 hours.

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Distance = rate x time

250 = x(5)   {substituted 250 in for distance, x in for rate, and 5 in for time}

5x = 250   {re-arranged equation}

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