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thienhello
2 năm trước
Tìm x, y, z biết: a)2012=|x-2010|+|x-2008| b)(x-3)²- $(x-3)^{2}$ =0 c) $\frac{3x-2y}{5}$ =$\frac{2z-5x}{3}$ =$\frac{5y-3z}{2}$ và x+y+z=50
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