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Toán Lớp 7: Tìm x, y, z biết: 7/3x = 2/16y = 19/6z ; 2x-y-z=-6

Home/ Toán Lớp 7: Tìm x, y, z biết: 7/3x = 2/16y = 19/6z ; 2x-y-z=-6

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