Ta có:
\(2000x=\frac{2000x}{2000x};5000y=\frac{5000y}{5000y};10000x=\frac{10000z}{10000z}\Rightarrow x=y=z\)
=> 2000x = 5000y = 10000z \(=\frac{2000x}{2000x}=\frac{5000y}{5000y}=\frac{10000z}{10000z}\)
=> \(\frac{2000x}{10000}=\frac{5000y}{10000}=\frac{10000z}{10000}\)
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