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lephonglan2100
2 năm trước
Một phân số có tử số bé hơn mẫu số là 11. Nếu tăng tử số lên 3 đơn vị và giảm mẫu số đi 4 đơn vị thì được một phân số mới bằng 3/4. Tìm phân số ban đầu. * Làm chi tiết hết cỡ ra giúp mình với nha ^^
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