Taylor is driving from City A to City B, which is 150 miles away. On the way, he stopped for a break after driving for 2 hours, during which he covered half of the distance. After the break, he increased his speed by 10 miles per hour and completed the rest of the journey in 2 more hours. What was Taylor's speed before the break? Let's think step by step and output the final answer within \boxed{}.
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