SOLUTION: Adam left Mike's house traveling west three hours before Carlos. Carlos traveled in the opposite direction going 30 mph slower then Adam for one hour after which they were 370 mile

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Question 983917: Adam left Mike's house traveling west three hours before Carlos. Carlos traveled in the opposite direction going 30 mph slower then Adam for one hour after which they were 370 miles apart. How fast did Adam travel?
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!

              rate            time       distance
ADAM           r              t+3        (   )
CARLOS        r-30             1         (   )
Total                                    370


Understanding the description indicates t=1. Revise the data table, including uniform rates rule usage. 


              rate            time       distance
ADAM           r              1+3        (r*4)
CARLOS        r-30             1         (r-30)
Total                                    370


4r%2B%28r-30%29=370
Solve for r.