SOLUTION: This word problem is difficult. Nancy drives 20mph faster than her father, Greg. In the same time that nancy travels 180 miles,her father travels 120 miles. find their speeds. I ne

Question 554322: This word problem is difficult. Nancy drives 20mph faster than her father, Greg. In the same time that nancy travels 180 miles,her father travels 120 miles. find their speeds. I need help.
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Start with:
d = distance, r = rate/speed, and t = time of travel.
For Nancy:
For Greg: The time, t, is the same in both cases.
and

Subtract this equation from the one above.
Divide by 20.
hours.

MPH. This is Nancy's speed.

MPH. This is Greg's speed.
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