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

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Question 268909: On Saturday morning, Lynn walked for 2 hours and then ran for 30 minutes. If she ran twice as fast as she walked and she covered 12 miles altogether, then how fast did she walk?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
rt=d
w*2+r*1/2=12
r=2w
r=8 w=4
check
2*4+4=12
12=12
ok