What was the important of set trade?what made salt so valuable

Salt was very valuable because it could maintain meat or vegetables for a longer time without rotting. It also gave flavor to the meat or vegetable.

Explanation:

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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