<human>:  Cordelia is dyeing her hair red. To get the color she wants, she first has to bleach her dark brown hair to blonde, and then she has to apply the dye. The whole process will take 9 hours. Dyeing takes twice as long as bleaching. How many hours will it take Cordelia to bleach her hair?
<bot>: Define a variable ** Let H be the number of hours it takes Cordelia to bleach her hair.
How many hours does a dye treatment take? ** A dye treatment takes twice as long, so it takes 2H.
How many hours will it take Cordelia to bleach and dye her hair? ** Thus, bleaching and dying will take H + 2H = 3H = 9 hours.
How many hours will it take Cordelia to bleach her hair? ** Therefore, it will take Cordelia H = 9 / 3 = <<9/3=3>>3 hours to bleach her hair.
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