SOLUTION: Karen biked at 13 mph for a time but got a flat tire. She then walked at 5 mph. She traveled a total of 93 miles. Had she biked the whole time, she would have gone 117 miles. How m

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: Karen biked at 13 mph for a time but got a flat tire. She then walked at 5 mph. She traveled a total of 93 miles. Had she biked the whole time, she would have gone 117 miles. How m      Log On

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Question 130343: Karen biked at 13 mph for a time but got a flat tire. She then walked at 5 mph. She traveled a total of 93 miles. Had she biked the whole time, she would have gone 117 miles. How many hours did she walk?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
"Had she biked the whole time, she would have gone 117 miles"
__ so the total time is 117/13 or 9hr

let x="hours walking", so 9-x=hours biking

5(x)+13(9-x)=93 __ 5x+117-13x=93 __ subtracting 117 __ -8x=-24