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mrs chan baked some cookies. she gave 3/5 of the cookies to her friend and 3/4 of the remainder to her brother. given that she gave 15 more cookies to her frined that her brother, how many cookies did she bake at first
We let the original number of cookies be x Her friend received (3/5)x while her brother received (3/4)(2/5)(x) or (3/10)x The difference between the friend's number of cookies to the brother is 15 so: (3/5)x - (3/10)x = 15 (3/10)x = 15 x = 15(10/3) = 50 Final answer: Mrs. Chan baked 50 cookies at first with the friend receiving 30 cookies and the brother receiving 15 cookies.
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