Find the speed of sarah car

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Can you explain how to solve this type of problem please.

On a recent trip, Sarah's car traveled 20 mph faster on the first 150 miles than it did on the remaining 80 miles. The total time of the trip was 4 hours. Find the speed of Sarah's car on the first part of the trip.

It's for precalculus.

Reference no: EM131397158

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