SOLUTION: linda walked for 2 hours then ran for 1 hour. If she runs three times as fast as she walks and the total trip was 20 kilometers, then how fast does she run

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Question 943848: linda walked for 2 hours then ran for 1 hour. If she runs three times as fast as she walks and the total trip was 20 kilometers, then how fast does she run
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
2x+3x=20
x=20/5
x=4
3x=12kph