Before the development of the money as a medium, goods and services were exchanged through a blank system.

Barter System

Explanation:

The barter system was a system that basically had you trade x amount of goods for y amount of another good. Usually you would need to find someone with the goods that you needed that also wanted the goods you were willing to give. Let's say you had a dozen eggs and tou really needed some wheat, you would then have to find someone with wheat that was willing to trade you for the eggs.

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