On his trip from Alba to Benton, Julio drove the first $x$ miles at an average rate of $50$ miles per hour and the

On his trip from Alba to Benton, Julio drove the first $x$ miles at an average rate of $50$ miles per hour and the remaining distance at an average rate of $60$ miles per hour. How long did it take Julio to drive the first $x$ miles?

(1) On this trip, Julio drove for a total of $10$ hours and drove a total of $530$ miles.
(2) On this trip, it took Julio $4$ more hours to drive the first $x$ miles than to drive the remaining distance.

Answer: A

Source: GMAT Prep

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