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Trangvo2000
2 năm trước
Bài 1 :tìm a ∈ Z a)|A|.5=10 b)|A|=0 c)|A|=-3 d)|A|=|-5| e)-11.|A|=-22 Bài 2 : tìm x,y thuộc Z BIẾT a) (x-3).(2y+1)=7 b) (2x+1).(3y-2)=-55 giải hộ mình với
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