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Odp: Należy odjąc 6 17/28. :)
x= 13 3/4 + 7 1/7= 13 21/28 + 7 4/28
x= 20 25/28
PROSZĘ :*
13 3/4 - 7 1/7=x
sprowadzam do wspolnego mianownika
385/28 - 200/28=x
x=185/28
x=6 17/28