Cookies

Mom bake cookies. Rolo took 2/9 of all cookies, Michal 3/9. How many cookies ate Rolo if Michal had 9.

Result

x =  6

Solution:

39n=9 n=27 x=29n=6\dfrac39 n = 9 \ \\ n = 27 \ \\ x = \dfrac29 n = 6







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