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Bichphuong2401
2 năm trước
Cho TLT : $\frac{3x-y}{x+y}$ = $\frac{3}{4}$ . Tính $\frac{x}{y}$ 2. Cho P = $\frac{x+2y-3z}{x-2y+3z}$ . Tính giá trị của P biết x,y,z tỉ lệ với các số : 5,4,3
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