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amy drove her car the same distance in six hours that juan drove his car in 5 1/2 hours. find the speed (rate) of amy's car, given that she drove 5 mi/h slower than juan.

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let Juan's speed be x mph
then Amy's speed is (x-5) mph

then 6(x-5) = 5.5x
solve for x, sub it back into x-5

(I got 55 mph for Amy)

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