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marla begins walking at 3 mi/h toward the library. her friend meets her at the halfway point and drives her the rest of the way to the library. the distance to the library is 4 miles. how many hours did marla walk ?

can anyone turn that into a equation ?

2 miles at 3 mph....3/60 gives you how far she would walk in an hour...times that by two....i do believe.

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