SOLUTION: Lynn walked for 2 hours then ran for 30 minutes, if she ran twice as fast as she walked and she covered 12 miles altogether how fast did she walk?

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Question 20463: Lynn walked for 2 hours then ran for 30 minutes, if she ran twice as fast as she walked and she covered 12 miles altogether how fast did she walk?
Answer by Paul(988) About Me  (Show Source):
You can put this solution on YOUR website!
2x+x=12
3x=12
x=4
Therefore walked 4km/h