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Укажи решение каждой пропорции.

1. \(\dfrac{x}{3}=\dfrac{28}{7}\) ,

   \(x=\) [ ].

2. \(\dfrac{x}{4}=\dfrac{25}{5}\) ,

   \(x=\) [ ].

3. \(\dfrac{70}{x}=\dfrac{20}{2}\) ,

   \(x=\) [ ].

4. \(\dfrac{30}{x}=\dfrac{36}{6}\) ,

   \(x=\) [ ].

5. \(\dfrac{x}{5}=\dfrac{16}{4}\) ,

   \(x=\) [ ].

6. \(\dfrac{140}{x}=\dfrac{40}{2}\) ,

   \(x=\) [ ].