SOLUTION: one morning john drove 5 hours before stopping to eat. after lunch, he increased his speed by 10 mph in order to complete a 430-mile trip in 8 hours of driving time. how fast did h

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Question 901326: one morning john drove 5 hours before stopping to eat. after lunch, he increased his speed by 10 mph in order to complete a 430-mile trip in 8 hours of driving time. how fast did he drive in the morning?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

Let x represent morning rate of speed. Total of 8hrs traveling      

5r + 3(r+10mph) = 430mi

 8r = 400

  r = 50mph, how fast he drove in the morning