SOLUTION: Thelma's average driving speed is 3 miles per hour faster than Doug's. In the same length of time it takes Thelma to drive 200 miles, Doug only drives 188 miles. What is Thelma's

Question 197729: Thelma's average driving speed is 3 miles per hour faster than Doug's. In the same length of time it takes Thelma to drive 200 miles, Doug only drives 188 miles. What is Thelma's average driving speed?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I have an equation for each one

and

---------------------
given:
mi/hr
(I'll call them both )
mi
mi
---------------------
What is Thelma's average driving speed?

and

Substituting,

hr
Substituting,

Thelma's average driving speed was 50 mi/hr
check:
mi/hr

mi/hr

and

OK

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