SOLUTION: Tara traveled 3 hours on the free way she then decreased her speed by 20 mph and traveled 4 hrs on a country road. Her trip was a total of 375 miles. What was her speed on the free

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Question 915414: Tara traveled 3 hours on the free way she then decreased her speed by 20 mph and traveled 4 hrs on a country road. Her trip was a total of 375 miles. What was her speed on the freeway?
Answer by josgarithmetic(39614) About Me  (Show Source):
You can put this solution on YOUR website!
r, unknown rate on freeway

___________________rate__________time_________distance
FREEWAY____________r_____________3_____________r*3
COUNTRY____________r-20__________4____________(r-20)*4
Total_________________________________________375