SOLUTION: One morning, Justin drove 2 hours before stopping to eat lunch at Chick-fil-A. After lunch, he increased his speed by 10 mph. If he completed a 260-mile trip in 7 hours of driving

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Question 1123248: One morning, Justin drove 2 hours before stopping to eat lunch at Chick-fil-A. After lunch, he increased his speed by 10 mph. If he completed a 260-mile trip in 7 hours of driving time, how fast did he drive in the morning?
Answer by ikleyn(52778)   (Show Source): You can put this solution on YOUR website!
.
Let x be his speed at the morning, in miles per hour.


Then his speed after lunch was (x+10) mph.


The equation for the total distance is


2x + 5*(x+10) = 260.


2x + 5x + 50 = 260


7x = 260-50 = 210


x = 210/7 = 30.


Answer.  His speed in the morning was 30 mph.

Solved.

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